If you're buying two of everything, buy one instead. Don't sit during breaks. Go for a walk. If you're into the gym thing, spend more time there. Get good at telling yourself 'no.' No cheat days. Cheat days just give you a chance to wipe out all your progress in one binge session. Get good at understanding what servings are. Realize junk food is exactly that. CHEW your food. Actually taste it. Don't just shovel it as fast as possible.