I often have trouble visualizing how much of a certain item I can have, this is especially a problem when I'm in a restaurant or at a buffet. This portion primer will give you visual guidelines that are easy to remember...so you'll know how much is too much. I hope this helps. I printed this out and keep it in my Weight Watcher's food diary, in my purse, so I'm always prepared when we go out to eat. Colette