If you want to learn about healthy ways to snack, whether a certain food is low or high glycemic, or what type of pasta to buy, check out these sources:

GlycemicIndex.com
This Web site is managed by the Human Nutrition Unit in the School of Molecular and Microbial Biosciences at the University of Sydney. You can use the free database to find the GI value of any food they've tested.

Ending the Food Fight (Houghton Mifflin)
David Ludwig's new book is designed for families, but anyone can appreciate his mix-and-match meal planners (in which you select low-glycemic ingredients to create a meal), the low-to-moderate-glycemic shopping list, and easy-to-make recipes.

The New Glucose Revolution Pocket Guide to the Top 100 Low-GI Foods (Marlowe)
Also includes neat little facts like this: Overcooked pasta has a high GI, while al dente has a low GI. The reason is that the less gelatinized, or swollen, the starch, the slower the rate of digestion.

As a reminder, always consult your doctor for medical advice and treatment before starting any program.