Cut out sodas and beer. Eat when you're hungry and stop when you're full. Start exercising. This doesn't have to mean going to a gym. It could be switching from driving to biking, or parking in the farthest spot, or going out for walks in the warmer months. I started biking to work (bout 8 miles each way) and I am in noticeably better shape. Resting heart rate is 65 and my legs look like tree trunks.