The order applies when headings are given as degrees, as they typically are in aviation. Easy enough to keep straight that 0 is North, and 180 is South, but are 90 & 270 East and West or vice verse? I always just used “East is Least” to keep it straight. Note that this clockwise convention is exactly opposite the counterclockwise convention used in many math and engineering studies, not to mention the 90 degree shifting if you normally have the +X axis going to the right, and North at the top of a map.
Whats that handy mnemonic for who posted what again?
Okay, I got this one! …a baby deer with rump spots of all colors* is standing in the graveyard, nibbling the shoots of a yew tree.
*Colored fawn = Colophon. 
Nobody had King Phillip came over for great sex?
Cations are positive.
Just remember all the plussy cats you’ve seen.
^ ^
+ +
=+=
I learned “Oil Rig” = Oxidation Is Loss, Reduction Is Gain
C BIG KD to deal with high potassium levels: calcium gluconate, bicarbonate, insulin and glucose, Kayexalate, and/or dialysis
The phases of mitosis: Please Make A Twin (Prophase, Metaphase, Anaphase, Telophase)
King Philip Caught Old Fish: Got Sick
The principal (of the school) is your pal.
Hmm. We used this too. Our Kindergarten teacher taught us this, but instead of ‘bad’ it was ‘black’.
I do. North/South are fine but I can never remember things that are differentiated exclusively by being right/left. I was taught Never Eat Soggy Wieners.
Baby eats candy apple until she explodes. Because.
Of course she did.
Not long since we had this before, when I mentioned this. Sadly Google is unforthcoming and only showed the link above, so I still can’t tell you what the causes of stoppages actually are.
I’m not too surprised by that version, as much as you learning about electronics color codes in kindergarten?
xkcd weighs in on mnemonics.
I like:"Mary’s ‘virgin’ explanation made Joseph suspect upstairs neighbor. "
Mnemonic is related to Mnemosyne, the goddess of memory. I’d like a mnemonic to remember the muses. I can only usually recall Mnemosyne, Terpsichore and Calliope.
If anyone tells you they are laying down, they’re lie-ing. (You lay down a rug, but you lie down to rest.)
We were taught “every good boy”, as kids; but we soon decided that “Every Grandma Bakes Dirty Fleas” was more memorable. 
And we must have been right, because it’s the mnemonic that automatically comes to mind, thirty years later…
For the bass clef, “Good Bugs Deserve Fruity Ajax.”
An oldie but a goodie:
Thirty days hath September,
April, June, and November;
All the rest have thirty-one,
Save February, with twenty-eight days clear,
And twenty-nine each leap year.
Make a fist. Look at your knuckles. Count each knuckle and each gap between as 1 month. Knuckles are 31 day months, the gaps are 28-29-30 days. When you pass July, start again on the first knuckle.