Sticking to a budget

If I'm ever to see any progress toward owning a piece of the earth and a house, I'm really going to have to be stricter with my budget. That means no more clearance racks at Kohl's, since a clearance rack seems to be my biggest downfall where spending is concerned. I'd probably be better off if I had budgeting software on my computers, both the desktop PC and my laptop, so I could keep better track of my spending and see where I'm failing to rein it in.

How do you keep track?