i'm notoriously horrible at restraining myself when eating, so i've found that the most helpful thing is to keep a food journal. up until now, they've always been on paper - and i always stop keeping them b/c it's a pain in the ass. but now i'm using a site called "the daily plate" and it's really easy - almost everything you eat is already in the database, or you can add it very easily.
i've been pretty successful at recording my consumption for the last three weeks, even though there are days when it's kind of embarassing. if there's anyone who wants to give it a try, you can add me as a friend and we can laugh at the ridiculosity of our food journals.
http://www.thedailyplate.com/users/profile/vitalicvision/ p.s. it is even easier if you have an iphone ; )