This should be the mantra for every person who is part of creating applications who have other users beside them.
I just started again reading Jennifer Tidwell’s ‘Designing Interfaces‘ (<- you can click this to direct you to the book’s site, you can read the book from there, me thinks). And, I love how she explain design concepts at the level that I can understand. I love how she explains designing application at the users’ point of view. And, I am not yet 1/4 of the book.