Those Girls Can Flirt And Other Queer Things Can Do
Can never remember Apatite & Orthoclase Feldspar, though.
Thirty days have September,
April, June, and November.
All the rest have thirty-one,
Save February, which alone
Has twenty-eight and one day more
We add to it one year in four.
I also learned this one for determining the lengths of months:
Make a fist and look at the back of your hand. Starting with your index finger and counting toward your pinky, name the months, assigning each to either a knuckle or the webbing between them as you go. When you get to your pinky knuckle, count it again, then come back until you run out of months in the year. Knuckles are 31 days, gaps are 30 (except February). Thus:
January - Index knuckle, 31 days
February - space between index and middle, a deep valley and so 28 days
March - middle knuckle, 31 days
April - space between middle and ring, 30 days
May - ring knuckle, 31 days
June - ring/pinky, 30 days
July - pinky, 31 days
August - pinky again, 31 days
September - ring/pinky, 30 days
October - ring, 31 days
November - ring/middle, 30 days
December - middle, 31 days
Krebs cycle: Can I Keep Selling Sex For Money, Officer?
Carpal bones: Some Lovers Try Positions That They Can’t Handle.
Scary Lucy tried pitching trapped trainees canned hams.
…for the carpal bones. The first two letters match the first two letters in the names of the bones.
Most common elements found in nature:
C Hopkins Cafe: Mighty Good Salt
Only if they also post what the bloody things **refer **to. <double sigh>
Where was this mnemonic during my neuro exam three weeks ago? I love it!
A friend invented “4 Neighbours Go to see (2C) REM Cooking Lobsters” for the components of a cell. Nucleus, nucleolus, nuclear membrane, nuclear pore, golgi apparatus, cytoplasm, centrioles, ribosomes, endoplasmic reticulum, mitochondria, cell membrane, lisosomes.
I knew OBAFGKM from my childhood astronomy kick.
Be My Little General - ranks of General Officers in the US Army, Air Force and Marine Corps : Brigadier (1-star), Major (2), Lieutenant (3), General (4).
I don’t suppose ROY G BIV counts, as it’s not made of actual words.
If you have to remember the the names of the great lakes:
Huron
Ontario
Michigan
Erie
Superior
For the “Naughty Elephants Squirt Water”–please tell me this was a mnemonic for something other than the directions, because it’s a lot easier to just remember the directions.
Romance languages: FRIPS
You’re right… that’s why I bombed out on piano lessons. :smack:
Some Old Hippie Caught Another Hippie Tripping On Acid… anyone? 
Loose Straps Mean Floppy Tits?
“Red on yellow, kill a fellow. Red on black, you’re alright Jack”
Coral snake vs. milk snake, others. (North America only)
Bingo!
All People Seem To Need Data Processing
or
Please Do Not Tell Sales People Anything
for the OSI Model’s seven layers. These mnemonics used to be on the Wikipedia page, but were taken away. Makes the Wiki page less useful in my opinion.
And isn’t the second mnemonic always true? 
Years ago I was very bored once:
Watching Agile Jolly Merry Monkeys Among Jungle Vines Hanging Tightly Pulled Together Fiercely Peeling Bananas Like Junkie Groupies Hollering Gaily At Clearly Hungover Celebrity Models Reminds The Wise Hearted Clear Headed Renaissance Thinker Everywhere Knowing Justice Now Freedom Can Ring Beyond Countries’ Borders, O.
My guitar teacher (we were both in our 30s at the time) told me “every acid dealer gets busted eventually.”
I learned it as King Philip Cried, “Oh For Goodness’ Sake.” And I learned the order of operations as “BEDMAS.” And then there was “SOH-CAH-TOA” for the trigonometric operations (sine is opposite over hypotenuse; cosine is adjacent over hypotenuse, tangent is opposite over adjacent).
We had two main mnemonics in French class in grades 8 and 9. The first was for the adjectives that precede the noun, to the tune of Frère Jacques:
Petit, grand, gros, joli, beau,
Bon, mauvais, bon, mauvais,
Premier, dernier, jeune, vieux, nouveau,
Lo-o-ong, lo-o-ong.
And then for the verbs that take “être” in the passé composé instead of “avoir,” there was DR. MRS. VAN DER TRAMP. Now, of course, I have no idea what all the verbs in the mnemonic are, though I use them all perfectly in normal speech.
My mom taught me “She cried ‘e-e-e!’ as she passed the cemetery” to remind me not to spell it “cemetary.” She had a lot of mnemonics, including one for Latin that I can only remember part of, but she still remembers perfectly: "[something something]/[…] permit, prescribe, decree/[…] the Roman way/Is an object clause with ‘ut’ or ‘ne.’ "
Oh, and “stalactites hold *tite *to the ceiling.”
Please Do Not Throw Sausage Pizza Away
Lap Eggs.
Lust, anger, pride, envy, gluttony, greed and sloth.