Skip the lunches out, and aim to bring a homemade salad every day. Since they're low in calories and full of fiber, you can eat an enormous bowl of veggies without doing damage to your waistline. Include a variety of greens and fresh veggies in your salad along with a low-fat protein source like chickpeas, cottage cheese, baked tofu or tempeh, or grilled chicken. Don't forget to pack a low-cal dressing like this strawberry balsamic vinaigrette. Not only does a daily lunchtime salad ensure a low-calorie meal, but it'll save you money too. Be sure to vary the veggies and protein source each day to prevent boredom.