I have 2 for stopping snacking, or as I call it, the midnight munchies.
1) We are mostly made of water and I've been told that sometimes when we feel hungry it is actually water we want. So I have a large glass firstly when I feel like snacking I also have one before a meal as well as during.
2) Many years ago I did a sponsored fast and sleeping 'out' for 24hours. We were advised that when we felt hungry to clean our teeth as this took the edge off it. However, no one told me how to clean my teeth sleeping in the porch of a cathedral.