buckworks - 3:12 pm on Sep 5, 2007 (gmt 0)

learn about navigation by trial and error

The less trial and error you foist on your users, the better. Do your best to go with the flow of the conventions they've learned elsewhere.

The easier and smoother you make it for users to do what you want them to do, the better the chance that they'll do it. That usually means working WITH user expectations, not against them.