I use my banks' bill pay service and would never want to go back to the old-fashioned way. This service is so easy to use and makes keeping track of due dates and payments a cinch.
You must first sign up with your bank to use the service, then follow the easy set up steps and pay your bills.
You simply input your billing information, such as: company name, address, account number, etc.. It can be set to automatically pay all or specific bills, or you can do all the bill payment yourself. You can also set up reminders of due dates so you never miss a payment.
I love it as I no longer have to write checks or buy stamps for bills.