• Akismet checks your comments against the Akismet web service to see if they look like spam or not. You need a WordPress.com API key to use it. You can review the spam it catches under “Comments.” This is a default plugin for wp. You just need to activate it.
• All in One SEO Pack. Out-of-the-box SEO for your Wordpress blog.
• Contact Form. Just another contact form plugin. Simple but flexible. It’s important to have contact form on your blog.
• Easy Retweet. Adds a Retweet button to your WordPress posts.
• Global Translator. Automatically translates a blog in fourteen different languages. This can help you gain more pages indexed at Google.
• Google XML Sitemaps. This plugin will generate a sitemaps.org compatible sitemap of your WordPress blog which is supported by Ask.com, Google, MSN Search and YAHOO. Configuration Page. After having the sitemap, submit it to Google webmaster.
• Link Cloaker. Maintains a list of ‘cloaked’ URLs for redirection to outside URLs
• Subscribe To Comments. Allows readers to receive notifications of new comments that are posted to an entry.
• Tag content from amazon. Add product based from Amazon on your tag page. Contact me if you want this plugin. Demo here.
• Twitter Tools. A complete integration between your WordPress blog and Twitter. Bring your tweets into your blog and pass your blog posts to Twitter. Show your tweets in your sidebar, and post tweets from your WordPress admin.
• Whydowork Adsense. Show adsense on your blog.
• Wordbook. Cross-post your blog updates to your Facebook account.
• WordPress Related Posts. Generate a related posts list via tags of WordPress. This helps your blog’s inner linking.
• WP Auto Tagger. Automatically finds tags based on your post content. This will create more pages for your blog, but you need to have Tag content from amazon plugin that I create.

My travel guide blog has problem in Google indexing. It used to have 800 pages indexed at Google, but now it only has 160. I think the reason of this is because Google thinks I have internal duplicate content on my blog. I notice that my tag pages does not indexe well now. Probably Google thinks they have almost similar content between two pages. For example http://etravelogy.com/tag/music-boxes/ and http://etravelogy.com/tag/official-languages-of-switzerland/. The only different thing in those pages is the title tag. So I definately need to change the tag page so Google thinks it has different pages. Probably adding amazon product based on the tag keyword.

Now I finally really know, than owning a domain name that have brand name in it is very dangerous. So don’t do it.

More info at http://www.warriorforum.com/main-internet-marketing-discussion-forum/149260-amazon-wants-my-domain-name-can-i-defy-them.html#I5wD7fBoehFgtC8t