What are your best boredom busters?

I have a tendency to eat when I am bored.  When I don't have anything specific to do, and miraculously, the kids are either quiet or asleep, I roam the house and end up munching on something.  Sometimes its healthy, like a handful of grapes or an apple.. And other times, not so much.  Chocolate covered pretzels have been my downfall this last week, so I have determined that next time I'm at the store, I will tell myself I don't NEED them.  That way I won't feel that I'm depriving myself and eat the whole bag in one sitting! :P

What is your best tip to keep yourself from grazing through snacks all day long?  I'm very interested to hear anything that will help me out.  I have been keeping record of my food intake consistenly for the last three weeks, and I'm noticing that on the days that I'm out of the house, I do alright, because I take small snacks in the diaper bag.  On the days that I'm home, my willpower seems nil, though, when I have time to sit around and do nothing.  :P