That's a really nice idea! I like that. What helped me from impulse buying is a simple thing; I always when I encounter something I want to buy I store it in the bookmarks (I have a folder in bookmarks called "To buy"). I only buy after a couple of weeks have passed and I decided I really need that thing. When I have a free time I go through my list and delete things that are obsolete. The second thing is, I have a limit of buying 1 thing per week (this includes also things like basic necessities, for example deodorant, that I need for myself). Needless to say I got the inspiration from my wife, she practices this for a few years already. The best thing about this is that it actually makes me feel good.