I was a compulsive spender. Never bought on credit mind but I’d blow my entire paycheque after bills on stuff like cameras, hifi, the latest Apple doodad, etc.
I literally stopped buying anything not required for my day to day sustenance. No Netflix, started renting what I wanted to watch which forced me to be more picky with my expenditure and time.
No more eating out except for special occasions. Packed lunches and home made meals only.
No more buying books until I read the ones on my shelf.
No more buying a new Mac every time my old one got mildly slow.
No more video games or Blu-rays until I had finished the ones sitting in shrink wrap on the shelf.
Once you pare things down you start to become almost painfully aware of how the seemingly little expenditures add up fast.
With the surplus income I ended up with about 6-8 months living expenses saved which suddenly made me realize that I had the freedom to look around from my present job. Which so far is working out I think... (started my own company and launching our product this month :)