Lifehack: Flipping the Mattress

The people say that you're supposed to flip your mattress regularly in order to minimize lumps and sagging . I've always had the problem that I don't know which way to flip. As the "strong" one in the relationship (ha!), it's always my job to do the deed, and I worry if I'm doing it right.

Last time I had to do it, I thought for a minute how to make sure I didn't mess up. I came up with:

On each of the 4 possible mattress positions, use a Sharpie to write a number 1 through 4. When it's time to flip, add one to the current side, and make that side be up. After 4, go back to 1.

Ta-da.

This post suggest one way to do it based on time of year, but I think I'd forget what season meant what. They suggest flipping every 3 months, which seems like a good interval.

American Scientist Online seems to have the same system as mine, but it's buried in complex math, and they count from o to 3, so my system is obviously better.