That's what we do too. EVERYTHING goes on the cc and I pay it as soon as it posts.
I voted 0, but that's not entirely accurate. I use a CC for just about everything, from gas and groceries to medical and phone, but I pay it off in full every month (and rack up cashback dollars like crazy).
I also have our new bedroom set charged to a Slumberland account, at 0% interest for 39 months. I could pay it in full at any time, but free money was too good a deal to pass up.