I have trouble with portion control too sometimes. Like Bassetlove, I tend to divied the servings of things that I might do this to into smaller portions - desert cups are good regulators.

I've read an account from a woman on another forum that she uses smaller plats and bowls to help with portion control. It seems to be more phsycologically full filling. You've eaten the "whole" thing, but it still wasn't as much as it could have been. I beleive she allowed herself as many bowls as she felt she needed, but because there was a logical break between bowls, that it was less likely for her to binge and eat the whole thing.