I do one of three things. I clean something (because there's always something that needs to be cleaned or organized) and I find something to watch on TV that is really compelling for me. And has no commercials. And then, I also end up on the computer where I surf the Net, pay bills, participate in some online education, or watch the commercial-free TV or movies that I love.
I guess there's a fourth thing...I set a timer until I can eat again. No going into the kitchen until the timer goes off.