Exercise is great but I just want to come in and say something about portion control because that's how i've lost weight. I haven't been able to exercise for three years because of stupid, dodgy pelvis. The two forms of exercise that I enjoy - walking and breastroke swimming are both out for me. So if you're not a gym bunny or exercise always seems a chore then I'd recommend that you do portion control. I eat what I like just in small quantities. I don't worry about trying to cut out carbs or treats like cakes, I just have small amounts. AND it's worked long-term, the weight's stayed off (even while pregnant) and I know it's something I can do for the rest of my life.