#1 Rule of Interface Design

From Bokardo:

#1 rule of interface design: the easiest action gets done most.

At least for public web sites, this is one of the truest, yet commonly ignored axioms. If a user wants to do A(fill a form), but B is just much easier to do (click a link), they just end up doing B. It sounds strange, especially from a traditional usability perspective, but this what I see happen all the time.

(via Kingsley 2.0)