I went through a rough patch about 3 months ago when I moved out, you really dont think how good you had it til ya move out. I was still spending money at the bar and on eating out with my girl like crazy, wasnt keeping track of how much money I had to keep, then bam, $550 rent, $400 insurance + food + hydro + phone = was down to under a hundred bucks.
Since then Ive grabbed tons more shifts at work and never turn down an oppurtunity for overtime, I also eat out ALOT less, but my girl likes that part anyways, and if youre into bar hopping at all, I used to only have 3-4 beers before the bar, cause I was always late for the predrinks at buddies places, now I show up early and pound 10 back, and you only drink a few at the bar.... saved me a good $100/week lol
But seriously, start a excel spreadsheet, I learned how to do it, you see where youre money is and how youre spending it.