Excellent thread I think it goes to show that although blowing money wasnt such a good idea at the time it allows you to learn from future financial mistakes. Now just learn and improve on them. Heres mine:
Fast food - equates to my lazyness which can be solved by buying food and cooking in advance. Hell after looking at bank statements it ends up being $3,000 just from eating out.
Electronics - more so for the excitement. (Iphone, Flat Screens, Ps3's etc) problem is that id get so bored I would end up selling stuff off
Gas - driving friends around, making double sometimes triple trips etc
It doesnt hurt to say "NO"
9/10 making any kind of purchase comes down to wants vs needs
I "WANT" nice things but I "NEED the basics