Well worry no more! My friend Kelli who blogs at 3 Boys and a Dog has compiled the essential list of plug-ins for WordPress blogs (and blogger too!)
Here are a few of my favorites that I’m already using, but be sure to check her site for all 23:
Out-of-the-box SEO for your WordPress blog.
This plugin will generate a special XML sitemap which will help search engines like Google, Yahoo, Bing and Ask.com to better index your blog.