If you are still humming and hawing about actually committing to the challenge I ask you this "what do you have to lose"? It costs you nothing except dedication and the will to make this year your best yet!
Or, why not take it one step further and finally find some eating habits that will help you lose weight and become healthier; AND the best part help you develop habits that you can maintain your entire life. No crash diets, or restrictive eating just healthy habits.
Check out Inspiration Training's Nutrition Coaching powered by Precision Nutrition Procoach for more details.