A lot of prepaid wireless carriers offer monthly Auto-Pay discounts for providing a debit card that's automatically charged a day or two before your due date. Cricket Wireless and countless other prepaid carriers offer such deals. You'll often save $5 per line for Auto-Pay, which is a nice amount. It's 12.5% off per month on Cricket's $40 monthly plan, so take advantage of Auto-Pay discounts for phone services and everywhere else!
It is my experience you have to be careful with autopay. There are too many carriers and service providers that will take the payment whenever they feel like it without adhering to a due date. It has happened to me and other people I know as well. I don't care what the discount is I won't use auto pay again. I have auto refill on my cell which is similar but my date isn't until after Christmas so I won't worry about it now.