Here are a couple of things I do:
(1) Distract Yourself - go for a walk, work on a hobby, play with the kids, read a book. If you can focus on something else, you won't be focusing on your hunger.
(2) Tell yourself it's ok to be hungry. Previously, my first reaction to hunger would be to run to the kitchen and eat something. I've learned that it's ok to feel hungry and that I don't have to eat in response to it.
(3) Delay your eating. Sometimes when I feel hungry I'll tell myself that I need to wait 30 minutes--and then, if I'm still hungry I'll have a snack. Thirty minutes seems do-able to me. Sometimes after 30 minutes the urge to eat has passed.