One thing to bear in mind is that credit cards by their very nature induce people to spend more than they would if they had to spend cash. This has been proven by researchers -- it does not apply to every person but it applies to most people. And in your case, you know you are personally vulnerable to this, I expect, since that's how you got into trouble with CC debt.
Therefore I hope you'll reconsider and go back to your original resolution which is to remove them entirely from your wallet, at least while you are paying off the loan. There's no reason not to use them for carefully considered recurring transactions -- e.g. a cell phone bill. Also ok if you think you can create a rule for yourself that you will only use the card in your wallet for gas and groceries (on which you are unlikely to spend any extra). But otherwise having them in your wallet will likely cost you far more each year (in excess spending) then any rewards you might get.
