College weight loss tips? Got freshman 30!

Calories & exercise. Weight loss at any stage depends on reducing caloric intake and increasing physical activity. It is important to not try drugs as these often have deleterious side effects.
Diet and exercise. The goal is to burn more calories than you consume. Watch your diet; eliminate junk food and don't over-eat. Consider liquids as well; soda, alcohol, etc. Contains lots of calories. Exercise multiple times a week. If you find an activity you really enjoy you'll be more likely to engage in that activity. Avoid fad diets that could prevent you from getting adequate nutrition. Make healthy choices!