Figure out something you might like instead of food/eating and put reminders around so you can substitute sometimes. I love to read and have been known to buy a few books and put them in my refrigerator, cabinet, by my chair (for when I'm working on something else and have a thought that upsets or scares me).

Arrange your cabinets, shopping and refrigerator like stores do with certain things on certain shelves so people see them and go for those things. If you have a freezer in a garage or someplace, store your ice cream there where it is a bit harder to go get. Make "silly"/ridiculous rules so you'll see how far you'll go to get a particular food (can only dish up ice cream with a teaspoon and have to open the container in the freezer (can't take it out) and "carry" each spoonful to a bowl across the room, etc.) and to give yourself time/space to realize what you are doing and how much you do/do not want to.

Don't make it easy to overeat, don't have foods you don't feel are useful/good for you in the house. I have lots of fruit, veggies, good dairy (yogurt, cottage cheese, lowfat cheese) and complex carbs around and only occasionally buy popcorn, chips, "snacks". Fortunately my husband likes "junk" and I was never taught to so I rarely eat his stuff (and he rarely eats my good fruit :-)