The psychology of the diet seems to get little play here, but there are a million little tricks you can use to make it easier on yourself. Things like Robby Robinson eating all his food out of one bowl and the decreasing the size to a smaller bowl.
A poster on here designed almost the perfect diet for obsessing over food: one big meal a day. Psychologically that will result in placing way too much emphasis on that one meal. Then binges and yoyo rebounds.