Create a grocery list of foods you will need to make packable lunches for the days you will be on campus. Try to include foods from all five food groups. Focus on whole grains, nuts, fruits and vegetables. Meats and dairy should form a smaller portion of your meal.
Purchase the items on your list from your local grocery store.
Split the items into single-serving portions. Group various items together to form complete lunch meals. Consider how well various foods will taste after sitting for several hours in your lunch box. Choose foods that complement each other and that will stay fresh until lunchtime.
Freeze breads and juices in advance. Use frozen bread to made your sandwiches. This will help foods stay cool and fresh up until the time you eat your lunch. Pack salad dressing separately from your greens so they will not wilt.
Carry soup and other hot foods in a thermos to keep them warm, and pack the thermos separately from your cold foods.