I stumbled across a great article by Josiah Cole called 19 Things NOT To Do When Building a Website. Aside from the obvious (not to mention tired) suggestions like avoiding the blink tag, purchase Josiah really hits home with some great advice. A couple samples:
8. If your website does not work in Firefox, welcome to 2007
10. If you use music on your site make sure the user can stop it, and it BETTER NOT start on page load without the user requesting it
11. Text navigations are better than images
17. If you’re delivering video, it better not ask the user which bandwidth or version of video they’d like.
Good stuff. Recommended reading.