I bottle and save my own urine. I've been doing so for about 7 years now. My basement is literally filled with 4 liter urine jugs. I figure this habit will somehow pay huge dividends in the future, although I haven't determined how.
Aside from that...
-I've been putting a large chunk of my salary towards stocks. This kind of panicked, pessimistic economic environment is an investor's dream that usually comes about once in a lifetime.
-I brew all my own beer. It works out to roughly 10 dollars for a case of 24, and it tastes way better than most store-bought beers.
-I buy whatever meat is on sale, and focus my shopping on the perimeter of the grocery store (seafood, vegetables, meat, dairy). I hardly buy anything convenient or pre-packaged
-My company matches my retirement contribution and adds 33%. I'm lucky as hell to have this, so I make the maximum contribution every year (not really a "saving money" tip...more long term)
-I pre-screen movies by downloading them first. I'm a film buff but have been burnt too many times by horrible movies. If I rate it as excellent I'll go to the theatre and see it.
-I don't go out to dinner much. I'm a pretty great cook and like to make my own stuff. I can expense my lunches to my company so I enjoy eating out then.
Basically, I avoid short-term splurging so I can become wealthy in the future. If most people in their late 20's and early 30's stopped blowing their paychecks (or worse, maxing out credit cards) on "bling" like huge TVs, jet skis, expensive vacations, swiss watches and so on, and instead learned about investing and put their money towards that, they could become millionaires within a reasonable time frame.