How do you plan for bills in two currencies?

After our move we'll have bills in both U.S. dollars and Canadian dollars. How do you keep track without checking exchange rates every hour?

I made two columns: bills paid in each currency, and the month they're due. Seeing the amounts helped more than watching the rate all day.

Do you keep a separate amount for surprise bills?

I set aside money for near-term bills in the currency I'll spend. The right amount is personal, so I review it when the bills change.

Two columns sounds doable. I'll try that before making any bigger money decisions.