Yesterday I found myself telling ds the mnemonic I was taught when learning the order of sharps in musical key signatures: Father Christmas Goes Down An Escalator Backwards.
It prompted me to remember some others I learned, like Lefty Loosey, Righty Tighty, Stalactites Hold On Tight while Stalagmites Grow Tall With Might, and Some Men Hate Every One: Great Lakes Superior, Michigan, Huron, Erie and Ontario.
They must work cos I am well old now and clearly haven't forgotten! What mnemonics (useful or otherwise) are indelibly imprinted on your brain?