Financially Risky

I'm looking at doing something- well I shouldn't say financially risky. It's a little imprudent, but if I stay on top of things (and I tend to do that), it should be fine.

What is it?

I'm thinking about getting a credit card to pay bills/make purchases with... for cash back. Yep, I am thinking about buying in to the rewards programs. As long as I am VERY careful and I make payments same-day, I shouldn't have to pay interest fees, should never be caught behind... and should make money back on normal purchases.

However... if even once I screw up and carry a balance, the interest rates would erase my benefits. It's a lot to think about, so I'm doing a lot of research on the cards and programs before I fully decide.

-Kristen