I use my credit card for everything, but that's because I don't want to be smacked with debit charges and it helps build good credit. That being said...
I make absolutely certain that I pay back every last penny when the next month rolls around. Did you know that if you owed $500 and paid back $499, they'd still charge you interest on the full $500? Yep. You can lose a lot of money that way. Think of it this way: if you keep your credit card payed off, you can actually buy more with the money you were previously spending on interest! That, and you never have to stress about being in debt.