Reduce your intake of "white carbs" -- potatoes, bread, white rice, flour, ANYTHING that is a "white" carbohydrate. They are quickly metabolized into sugar and are not needed in huge amounts unless you are running a marathon, climbing the Himalayas, or involved in some activity where carb burning for fuel over a long duration is necessary.
Move your body every single day. No skipping out. If you don't feel up to going to the gym to exercise, go outside and walk, run or (be silly and) skip. Move every part of you... not just your legs, but your arms, waist, hips, shoulders, butt... shall I go on?