I hate diets.
There now that you know (my mother and her health kicks made me the least popular in the schoolyard) diets are not my cup of tea, let me explain. The average person grabs chips a pop and some smokes at the place I work. Given that chips and pop are null of almost anything your body wants I change that to nuts or seeds and a juice or chocolat milk. I expell a lot of energy in a day so I really try to keep extra stores of fat (I'm 138lbs so ya they don't last) by motoring through a pizza, gorging on krullers and using real cream to dunk cookies in (and 3.5% in the fridge)!
All I'm pointing at is that you can really have a better start for a game if you try to fuel your engine! Pasta the night before and granola bars in the morning, bring fruit to the field instead of redbull and if you have to have a MRE bring some mints:|