Add this PHP code at the end of functions.php file from the theme folder

<?php

if ( ! function_exists( 'breadcrumbs' ) ) :
function breadcrumbs() {

	$delimiter = '&rsaquo;';
	$home = 'Home';

	echo '<div xmlns:v="http://rdf.data-vocabulary.org/#" class="breadcrumb">';

	global $post;
	echo '	<span typeof="v:Breadcrumb">
 			<a rel="v:url" property="v:title" href="'.get_bloginfo('url').'">'.$home.'</a>
			</span> '; 

	$cats = get_the_category();
	if ($cats) {
	  foreach($cats as $cat) {
	  	echo $delimiter . "<span typeof=\"v:Breadcrumb\">
	    			<a rel=\"v:url\" property=\"v:title\" href=\"".get_category_link($cat->term_id)."\" >$cat->name</a>
	    		</span>";
	  }
	}

	$posttags = get_the_tags();
	if ($posttags) {
	  foreach($posttags as $tag) {
	  	echo $delimiter . "<span typeof=\"v:Breadcrumb\">
	    			<a rel=\"v:url\" property=\"v:title\" href=\"".get_tag_link($tag->term_id)."\" >$tag->name</a>
	    		</span>";
	  }
	}

	echo '</div>';

}
endif;

?>

The above code will generate the breadcrumb from the post categories and post tags values of the current post. The parent category will be show at the first then its child, and finally add if any tag presents.

Add the following function call in your single.php file.

<?php breadcrumbs(); ?>

Place this code above the the_title() function or below the_content() function calls.

Add the following CSS in you Style.css

/* BreadCrumbs CSS*/
.breadcrumb {
	font-size: 11px;
}
.breadcrumb a {
	color: gray;
	text-decoration: none;
}
.breadcrumb a:hover {
	color: #178A00;
}

So now your WordPress blog’s breadcrumb is Search Engine Optimized. You can see the results from your next post onward. Its so simple

Also See : SEO Friendly Breadcrumb Format

1. All in One SEO Pack

The WordPress itself is Optimize the contents for search engines. But while using All in One SEO Pack you will get much control over the SEO. In this you can change the meta-data, descriptions, titles and set the index/follow of each pages or views with in the All in One SEO Pack plugin settings page.

Download » All in One SEO Pack

2. WP-PageNavi

By default there is no pagination support for the WordPress. So WP-PageNavi is one of the best plugin for WordPress Pagination.  Check the Screens for the settings page and its output.  You need to place php code inside the theme files.

Download » WP-PageNavi

3. WordPress Related Posts

WordPress Related Posts Plugin will generate a related posts via WordPress tags, and add the related posts to feed. Insert the <?php wp_related_posts(); ?> code inside your theme file, where ever you want to show the related posts.

4. Upcoming Posts Widget

It is better to let your readers know exactly what and when you will post something.
Features 1. Help you to show cheduled posts or drafts. 2. Configure in the widget: the number of posts; show the excerpt; the time format; a specific category. 3. Make your own style by editing ucp.css and ucp_widget.php files.

Download » Upcoming Posts Widget

5. Google XML Sitemaps

This plugin will generate a special XML sitemap which will help search engines like Google, Bing, Yahoo and Ask.com to better index your blog. With such a sitemap, it’s much easier for the crawlers to see the complete structure of your site and retrieve it more efficiently. You can generate the sitemap xml from the plugin’s settings page.

Download » Google XML Sitemaps

6. WPtouch iPhone Theme

WPtouch automatically transforms your WordPress blog into an iPhone application-style theme, complete with ajax loading articles and effects, when viewed from an iPhone, iPod touch, Android, Opera Mini, Palm Pre and BlackBerry Storm mobile devices. The admin panel allows you to customize many aspects of its appearance, and deliver a fast, user-friendly and stylish version of your site to iPhone, iPod touch, Android, Palm Pre and BlackBerry Storm visitors, without modifying a single bit of code (or affecting) your regular desktop theme.

Download » WPtouch iPhone Theme

7. Sociable

Automatically add links to your favorite social bookmarking sites on your posts, pages and in your RSS feed. You can choose from 99 different social bookmarking sites!

Download » Sociable

8. FeedBurner Widget

FeedBurner Widget is very simple sidebar widget plugin to easy customize and display your FeedBurner subscribers stats button.

Download » FeedBurner Widget

9. Count Per Day

It counts 1 visit per IP per day. So any reload of the page don’t increment the counter.  Features: Count reads and visitors,  shows reads per page, shows visitors today, yesterday, last week, last months and other statistics on dashboard, shows country of your visitors

Download » Count Per Day

10. NextGEN Gallery

NextGEN Gallery is a full integrated Image Gallery plugin for WordPress with a Flash slideshow option.

Features
* Templates : You can add custom templates for your theme.
* Media RSS feed : Add the Cooliris Effect to your gallery
* Role settings : Each gallery has a author
* AJAX based thumbnail generator : No more server limitation during the batch process
* Copy/Move : Copy or move images between galleries etc…etc.

Download » NextGEN Gallery

Enjoy Blogging

Sitemap index file must be UTF-8 encoded.

A single Sitemap file cannot list more than 50,000 URLs and must be no larger than 10MB (10,485,760 bytes) when uncompressed.

If you want to include more URLs or If you do provide multiple Sitemaps use a “Sitemap index” file ( as http://www.yourdomain.com/sitemap_index.xml). A Sitemap index file can list up to 50,000 Sitemaps.

Do not include session IDs in URLs.

Do not include direct image URLs in Sitemaps

The XML format of a Sitemap index file is very similar to the XML format of a Sitemap file. The Sitemap index file must:

<sitemapindex> – the parent tag surrounds the file.
<sitemap> – the parent tag for each Sitemap listed in the file (a child of <sitemapindex>)
<loc> – the location of the sitemap (a child of <sitemap>)
<lastmod> – the last modified date of the sitemap (optional)

The Sample XML Sitemap Index

<?xml version="1.0" encoding="UTF-8"?>
   <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <sitemap>
      <loc>http://www.example.com/sitemap1.xml.gz</loc>
      <lastmod>2004-10-01T18:23:17+00:00</lastmod>
   </sitemap>
   <sitemap>
      <loc>http://www.example.com/sitemap2.xml.gz</loc>
      <lastmod>2005-01-01</lastmod>
   </sitemap>
   </sitemapindex>

There are mainly two types of sitemaps

1. HTML sitemaps :- listing all the pages of your site often by section. Check the example URL for more clear picture for how can arrange things in simple way.(eg: http://www.apple.com/sitemap/)
2. XML Sitemaps :- usually called Sitemaps, with a capital “S”. Mainly for give informations about your pages to the crawlers or search engines.

The second type(XML Sitemaps) we’ll be discussing in this article.

Step 1:-

Create a XML file named “sitemap.xml” and copy paste the following lines

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url><loc>/*your site pages*/</loc></url>
</urlset>

Step 2:-

Edit the line no:3 onwards as shown below. List all pages of your site in the tags.

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url><loc>http://www.yourdomain.com/index.html </loc></url>
<url><loc>http://www.yourdomain.com/page1.html </loc></url>
<url><loc>http://www.yourdomain.com/page2.html </loc></url>
<url><loc>http://www.yourdomain.com/etc.html </loc></url>
</urlset>

Step:3 *optional

The optional tags are “<lastmod>, <changefreq>, <priority>“.
<lastmod> – The date of last modification of the file in YYYY-MM-DD format.
<changefreq> – How frequently the page is likely to change, valid values are:

1. always
2. hourly
3. daily
4. weekly
5. monthly
6. yearly
7. never

The value “always” should be used to describe documents that change each time they are accessed. The value “never” should be used to describe archived URLs.

<priority> – The priority of this URL relative to other URLs on your site. Valid values range from 0.0 to 1.0. The default priority of a page is 0.5.
With the optional tags the xml looks like:

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url><loc>http://www.yourdomain.com/index.html </loc>
<lastmod>2009-12-10</lastmod>
<changefreq>always</changefreq>
<priority>1.0</priority>
</url>
<url><loc>http://www.yourdomain.com/page1.html </loc></url>
<url><loc>http://www.yourdomain.com/page2.html </loc>
 <lastmod>2009-05-29</lastmod>
<changefreq>daily</changefreq>
</url>
<url><loc>http://www.yourdomain.com/etc.html</loc></url>
</urlset>

Wowo !! How simply you created a sitemap. Next the final and most important step ie: submitting the Sitemaps files

Step :- 4

You can submit your Sitemaps file(s) in many ways.
for more information about the sitemaps file see the Sitemap-guidelines article too

First methond is Autodiscovery via robots.txt:

Add the Sitemap file to your robots.txt files.

User-agent: *
Disallow:
Sitemap: http://www.youdomain.com/sitemap.xml

Or the second method is Pings:

Several search engines have introduced a standardised support for Sitemap Pings. To submit your sitemap to a search engine (ping) use the following format:

http:// <search-engine-url >/ping?sitemap=http://www.youdomain.com/sitemap.xml

You will get a confirmation message from the search-engine-url if the submittion is valid.

Example:

Google.com
http://www.google.com/webmasters/sitemaps/ping?sitemap=http://www.tutorboy.com/sitemap.xml
Yahoo.com
http://search.yahooapis.com/SiteExplorerService/V1/ping?sitemap=http://www.tutorboy.com/sitemap.xml
Ask.com
http://submissions.ask.com/ping?sitemap=http://www.tutorboy.com/sitemap.xml
Moreover.com
http://api.moreover.com/ping?u=http://www.tutorboy.com/sitemap.xml
Bing.com(MSN)
http://www.bing.com/webmaster/ping.aspx?siteMap=http://www.tutorboy.com/sitemap.xml