Learn to cook. Recipes are easy to follow, and can be found all over the internet for anything you want to make. I eat cheap meals for breakfast and dinner every single day (spaghetti, pb & j, ramen, oatmeal, pancakes, etc.), but always make sure to have a decent meal (still homemade) for supper to keep myself healthy and sane. Casseroles are easy to make, travel well, and last forever. I also make pizza and fajitas...the envy of the crew room. Such "nice" meals often cost me a mere $2 each by the time it's all said and done. Other tips...buy the generic brands of food, it will save a great deal of money. Always pack food for the trip, or search for happy hours with free/half-price appetizers. Drink water. Stay single. Don't get speeding tickets. When you buy something, make sure it will last...get short haircuts that will last a while, buy good luggage that you won't have to buy again later, etc. Share a room (wish I'd done that one).

Good luck!