The restraint kinda burns

So my cash flow sheet says I will have $4.00 left tomorrow when my car payment comes out. I've been staying home, not spending a cent for days now. Yesterday I got a $75.00 Amazon gift certificate, and expect another one today. Those are for some U of A research I took part in. I want to just spend that money so bad, but I'm trying to save it for when I actually need something. I will allow myself some books for my kindle. I have been wanting to go out to sing Karaoke and drink beer really bad! But I haven't done it. I think all this financial restraint might be a good part of why I am eating like a hog. The self-indulgence has to come out somewhere.