That's exactly what we do with our Venture Card. We use it for absolutely everything, including recurring bills as long as the payee doesn't charge a convenience fee for paying by credit card. I don't bother to save my miles for a ticket, I just go online every couple of months, and use the purchase eraser to get credits. I keep track of all of our expenditures in Quicken (it's the retired banker in me, lol) so at the end of the year, I can see how much I've earned. In six months this year, we've already earned over $900, so our SXM tickets will likely be free by year-end. The key is to use the card like cash, and pay in full every month.