I have bills that are due every year. My car tags are due in March, my association dues in May and my termite bond in November. Instead of trying to figure out how to pay those bills when their due date rolls around, I pay them throughout the year.
I take the balance of each bill and divided it by 12. Each month, I take 1/12th of the bill and put it into my savings account (and use the Savings Account Breakout Sheet to track it). When the bill is due, I have the money for the bill in my savings account and can pay it effortlessly.
Hopefully this strategy will work for you.