Self examination is a hard thing to do. It is painful to look within and see what lurks in the darkest corners of your heart. But the Bible tells us to "Examine yourself to be sure your in the faith" (2 Cor. 13:5). So it is something we MUST do!
There is a message by Todd Freil from the Way of the Master radio show that really gives you a kick in the chin and helps you to examine yourself. You can stream it here.