30 is wordy, but I've summarized it below.
In this episode I give tips for how to make a good web site or PowerPoint. I go on for a bit, but it all boils down to this:
1. Decide exactly what your website is about. (Example: Mine is about art, education, and technology.)
2. When adding anything, ask if it will support or get in the way of that content.
It sounds simple, but you'd be surprised how many things you can add to a page that you really shouldn't add.
WebPagesThatSuck.com - a great site that teaches good web page design through bad design. They also have a book.
Podcast Alley: Education Podcasts - C'mon, you know you want to vote for me ... right?