I disagree with the "sop up the extra insulin" theory by eating high carb foods. The idea is to prevent the insulin spike and subsequent blood sugar drop in the first place. You don't want to perpetuate the cycle, you need to stop it.
Insulin spikes when sugar, starch and other carbohydrates are injested. While the insulin is doing its job removing the injested sugar from the blood stream, it may go overboard and take out too much sugar leaving us feeling yucky, and sometimes, ready to pass out. For example, that's what happens when we eat a candy bar - a gush of insulin to remove the gush of sugar we just stuffed into our mouths.
So the solution is to create a balance of carbs, protein, fiber and yes, fat, everytime you eat something. So...pretzels with cheese or peanut butter, celery with cream cheese or peanut butter, dried fruit and nuts, greek yogurt (not non-fat) and jam/fruit, a vegetable omelet, etc.
This will help steady blood sugar levels, prevent an over production of insulin, and subsequent drop in blood sugar. I believe that eating real whole foods are the best bet - whole fresh fruit, whole fresh vegetables, real meat, beans, real cheese and milk, and protein-packed whole grains like quinoa. To be dramactic, processed food is the curse of mankind!
Check out some info on low-glycemic foods. There are ga-zillions of books, articles and internet sites on low-glycemic foods and eating.
The problem is not knowing what to do, it's just doing it!
Good luck to all!