You've got the exercise part of it down, but I bet you can still improve on your diet. Check out Joel Fuhrman's "Eat to Live." I went on it because I had some heart troubles, but it has also kept me from gaining weight. I'm on Seroquel which is definitely not weight neutral. I have actually lost 13 pounds since I started the diet. It takes a lot of self-control, but it's worth it.