When you fail, take advantage of it.
Use the feeling of being fat to motivate yourself to do something about it.
If you have binged, all the extra calories and junk food will make your metabolism that of a fat person's for a while. Overweight people have better metabolisms than thinner people, and this is because the body knows that they need it.
You will burn more calories, and lose weight faster and easier.
No panicking, no self abuse, just calm. Let yourself relax.
Drink lots of water, and try and fill up on fruit when you get hungry.
That's my plan anyways...