My friend and I were talking about the little beliefs we've come to on our own, that may or may not be true, but we tell ourselves, about diet and weight loss. What are yours? Here are some of mine:
Easy on, easy off: If you gain a lot of weight in a short amount of time (like 6 pounds in a week), it's not "really" on there hard, so you should be able to take it off equally quickly. (I tell myself that--I'm not sure if it's true!)
The way you lose the weight is the way you're going to have to keep it off: If you lose it by doing the treadmill for an hour a day, you're going to have to keep doing the treadmill an hour a day to keep it off. Likewise, if you lost the weight by cutting out alcohol, or whatever.
Free food doesn't have any calories. Saw this one on a Cathy comic strip, and realized it hits a little close to home! (Likewise, calories posted vs. calories not!)