There is a big bunch of resources on optimizing your blog for search engines. I have tried to collect the best tips and plugins in this article.

These tips won’t flood your blog with visitors – no SEO tips will. Use these tips to improve your site, and fight for a lot of backlinks and visitors by writing quality content and putting a lot of work into it. It has never been easy to run a website, and it for sure isn’t getting easier.
Permalinks

Use a permalink structure and be sure that the post title is in it. In the WordPress administration go to Options>Permalinks and select a permalink structure, or make your own. I use /%year%/%monthnum%/%postname%/ on this site.