Stephan Spencer, the founder and president of Netconcepts, has a nice article that tackles search engine optimization mistakes that most bloggers commit.

The SEO mistakes include:

1. Allowing title tags to be auto-generated (from the post title, category name, etc.). Every category page and most permalink pages (i.e. post pages) should be hand-crafted.

2. Letting pages get indexed that should never be indexed. Some pages shouldn't be allowed into the search indices because they are either basically content-less or because they are substantively similar to other pages.

3. Having multiple homes for your blog. Does your blog have what search engine geeks refer to as "canonicalization" issues? If you can get to a page by multiple URLs, then the answer is "Yes."

4. Not using "optional excerpts" to minimize duplicate content.

5. Not using rel=nofollow to strategically direct the flow of link gain.

6. Over-reliance on date-based archives. Most blogs organize their archives by month rather than by keyword.

7. No stability in keyword focus on category pages. When categories have been selected - at least in part - because of keyword research, then your category pages can be of great SEO benefit.

8. Suboptimal URLs. The most optimal URLs contain relevant, popular keywords and a minimal number of slashes, without any question marks.

9. Only one RSS feed, and it's not even optimized. Each category on your blog should have its own category, so that people who are mostly interested in just one topic can subscribe to - and hopefully syndicate - the category-specific feed.

10. Offering suboptimal podcasts.

11. Putting your blog's URL or your RSS feed's URL on a domain you don't own.

12. Using suboptimal anchor text when linking internally. It's not uncommon for bloggers to use "here" or "previously" or similar suboptimal phrases as anchor text within post copy. Resist the temptation and use relevant keywords instead.

Now ask yourself: Are you guilty of these mistakes?