The more you get done at work, the more you learn. That's the reason you're so satisfied these days. Even the most challenging days are, in a strange way, fun. It's great how much you love your career, but be careful not to become self-obsessed. When you come right down to it, you are part of a team, and your relationships with everyone else are as important as the work you do. A group brainstorm at the end of the week is going to yield some terrific ideas. And it will remind you how lucky you are to have the job you do.