From usability expert Jakob Nielsen’s useit.com. I’ll plead guilty to #2 and #5 on a few of our sites. I’m iffy on a couple more. If you have a blog (or any kind of website), this is a handy check-list.

1. Bad Search
2. PDF Files for Online Reading
3. Not Changing the Color of Visited Links
4. Non-Scannable Text
5. Fixed Font Size
6. Page Titles With Low Search Engine Visibility
7. Anything That Looks Like an Advertisement
8. Violating Design Conventions
9. Opening New Browser Windows
10. Not Answering Users’ Questions