Having had this myself, and writing this totally off the cuff at work... the diet is essentially the same as a diabetic diet. You need to watch your sugar (carbohydrate) intake. Many sports drinks have a lot of sugar in them, so you'll need to be careful. You need to eat more frequent small meals. Have a bit of cheese with an apple. It's important to not skip meals.
If you're one to drink sugar in your tea or coffee or drink sodas, you'll need to cut back, retrain you're taste buds to less, and/or switch to artifical sweeteners. No more sugar (real) syrup on your pancakes - try applesauce with cinnamon.
Find a dietician, either through your doctor's office, hospital, or insurance company and work with them.
There are some pretty good diabetic cookbooks out there, hit your local book store and get one or two.
Good luck!