First of the month chores...

If I don't do certain chores consistently, I forget when the last time was that I did them. For instance, washing my sheets, washing our towels and flipping my mattress is not usually on the forefront of my mind. My solution is to do them around the first of every month. That way I always know when they were last done AND I get the benefit of jumping into a fresh, crisp bed every four weeks (that's the best part, isn't it?!). What tips to you have for staying on top of chores?