Eat lots of vegetables every day. Your Caesar salad, the lettuce leaf on your hamburger or the carrot you chew as a snack - all count. Definitely include dark green leaf vegetables and legumes, as they are excellent sources of different vitamins and minerals. Go easy with dressings, toppings, butter and mayonnaise because they have a high fat content.
Fuel your body. A lack of energy could be more to do with a lack of carbs than a lack of sleep. If you feel constantly drained of energy, try eating more vegetables, fruits and grains. In addition to being packed with vitamins and minerals, they are low in fat and an excellent source of complex carbohydrates.
Buy low fat yogurt and make sure you have a bit of it in your fridge. Yogurt is a great meal supplement that is low in calories and fat. It also tastes great and is good for your health. It is also relatively inexpensive, allowing you to keep your food budget low.