College and Weight-loss???!!!

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So I am a college student trying to get into the best shape I have ever been in. I am 20 years old and it is time that I get it together before it is too late. I have trouble staying motivated and staying strong against all my cravings and weaknesses of food, so that is why I need the community of myfitnesspal to help keep me motivated. I love the whole idea and energy of this site, it is so inspiring. I have tried so many times before to lose weight but I do believe that this time will be different.

How do you all stay motivated through school, work, and life in genereal?