Which practical rhymes or sayings do you use often?

Or, what are some of your favorites?

I’m not ashamed to admit I still think “righty-tighty, lefty-loosey” when I’m using a screwdriver. I’m sure we all have these rhymes or sayings that we learned as a child to help us remember practical details. Some of them come so naturally, it’s almost involuntary to chant “m-i-s, s-i-s, s-i-p-p-i” when spelling the state name. Which do you use? Or which ones have you heard that really stuck with you?

It would help if you could post the explanation for it too, if it requires one!