Bills. They're the necessary evil no one enjoys dealing with, but the ability to pay them online takes a bit of the sting out of the process. Setting up a regular online payment schedule will help you avoid late fees because everything's automatically paid on time -- no stamps necessary. This is particularly helpful for bills that don't typically fluctuate in amount, like car or mortgage payments.
Bills that do change in amount can be easily monitored and paid at your leisure. Many banks allow you to set up reminders that will alert you about upcoming payment deadlines so you don't forget to pay your bills on time. Just make sure you have enough cash in your account to cover all your payments; otherwise, you'll also end up owing an overdraft fee.