I've developed perfectionist tendencies which frustrates me to no end. I'm a graphic & web designer, and although I've been doing it for 20 years, I still get discouraged if what I think up isn't perfect the first time. I start doubting myself and go into avoidance mode; avoiding the work and the client, which just makes the situation worse. My mentality becomes "Well, it wasn't perfect, so it'll never be perfect, so why bother trying?" The stupid thing is I know better, and yet, I can't get over that mental hurdle, and continue spinning my wheels. Frustrating, indeed.