With the days of automated payments making things easier and easier to just "set and forget," there are still some things that you're better off paying manually. Even if you pay it online, it's still a good idea to make sure you're not letting it automatically pay each month. This article gives you some good pointers for why you might not want your utilities or cell phone payment to just automatically come out of your account.
While you're there, you might also want to check out what not to keep in your wallet.
While you're there, you might also want to check out what not to keep in your wallet.