We use chip clips a lot at our house. We use them for pancake mix, frozen veggies, brown sugar, cereal, and, of course, chips, amongst other things. Unfortunately, because they're so well used, we don't have enough chip clips to go around at our house. I make do by simply closing bags using binder clips.
Using office supplies in the pantry makes me feel a little trashy, but not enough to actually go out and spend money buying more chip clips. Binder clips work for me.