Stay away from carbonated drinks both energy drinks and diet sodas (moderation is ok as with anything), your carb sources should be from complex sources eg oatmeal, pasta, brown rice, wheatbread. The exception being post workout when simple sugars eg dextose are ideal to replenish gylcogen stores.
Personally i wouldnt bother with fat burners, your aim with fat burning will be to keep a high metabolism, this is easily achieved through a well planned diet, involving a reduction in calories, but just enough to lose say 1-1.5lbs a week tops. Your workouts will also play an integral role in maintaining muscle mass and again increasing/maintaining a high metabolism. If you can get those right then fat burners just dont figure and personally i see them as a waste of money.
Do or do not, there is no try.