When you can pay your bills online, you don't have to pay for stamps, and you can set up repeating payments for those bills that you need to pay each month (mortgage, student loans, car payments, etc.).
Plus, you can access your account anytime to see your balance so that you never overdraw and have to pay fees. And if you are lucky enough to have a bank like mine, you can even get paid 10 cents every time you make a "paperless" transaction.
It takes a little bit of time to set up your account in the beginning, but once all the info is entered it actually makes paying bills a LOT faster.
Save the planet, save a dime, save time and save stamps. What a deal!!