After you've begun to lose a good amount of weight, go through your old clothes and get rid of any that no longer fit. This is a really good way to see the progress you've made losing weight, and it keeps you motivated for the long run. Besides giving you incentive to maintain your new weight, it will encourage you to keep up the good work and push on in your weight loss journey.
A really good way to lose weight is to stock up on bottled water and keep a bottle with you at all times when you're out and about. By having bottled water readily available, you won't have to resort to drinking an unhealthy drink like soda or a mocha latte.