Let's share. What kind of songs/mnemonics/etc did you learn as a kid and still find useful today?

Inspired from a recent trivia night...There was a question about Henry VIII's wives and someone on my team said "divorced-beheaded-died/divorced-beheaded-survived." I'd never heard that before and now I'll never forget!

Others: The Animaniacs Presidents song taught me all the presidents in order. Very helpful in trivia. :) There is a rat in separate. There are parallel lines in the word parallel.