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I act like an adult that has responsibilities and budget myself. If you're spending everything you make, it really doesn't matter how much money you make because you'll just spend more when you make more. You just need to grow up.
I'm 25, I own my own house, own a car that's already paid for (96 Z28) and pay notes on my girlfriend's car. I think we'll be buying a ski boat next summer too. (I love wakeboading) I'm not rich by far, I just know how to save and invest. You'll never get anywhere acting like a kid in a candy shop.
figure out how much money you make after taxes. then figure out how much you have to pay for rent and food, then whatever is left over is money you can spend or save. i would recomend trying to save half of whatever is left over since like jung said it is a good idea. im not sure if you go to college or if you have to pay for it(or if the parents are covering it), but in both cases it would be nice to graduate from college and have easily a couple thousand dollars invested or saved.
I'd suggest investing in something like Microsoft Money or Quicken. It'll give you an easy way to set up budgets and track your income and spending. If you have a decent bank they should support MS Money.
Personally, I use MS Money, it does everything I need it to: income/spending tracking, check balancing, budgeting, taxes, bill tracking and reminders, investment portfolio, 401K, stock and information portal, et al.
Then again, this can all be done for free or relatively cheaper by other methods. I prefer this way because everything is centralized.