Take everything away
by Derek Sivers
Related link: http://www.37signals.com/svn/archives/000912.php
I rarely make an entry here just pointing to someone else's blog entry, but I think everyone should read interface laundry and the Pushing Your Limits presentation it references. As I mentioned earlier in say no by default (also inspired by the 37 Signals guys) - I think this is one of the most important design lessons to learn. Not just visual-design, but EVERYTHING-design.