Best Advice get a prepaid credit card, I.e one you add money to and leave it, this way each month you can put 15 dollars on it, when bill comes in, takes the money out of the card, and your safe. I've had my fair share of booboo's using a bank card and not having money, nothing more then 35$ each time you bounce it.
For small stuff like Aces High I'd recommend this method, you can goto walmart get a card free, its quite simple you can use a bank card to transfer money to your account and its pretty safe too i.e you only have so much on the card.