Keep website navigation simple
Chris Heilmann makes a lot of very important points regarding website navigation in Navigation - our visitors' travel guide. The following sums it up pretty well:
If our navigation grabs the visitors' attention and distracts from the content, then it failed its purpose. The content should determine the navigation, not the other way around.
Ouch. That's gotta hurt for some web designers out there - namely those that view content as little more than a necessary evil to complement their latest super cool Flash-based navigation.