I like mine better, which I revealed in a previous thread (careful, it might make you gag):
My visible erection made Justice Scalia unusually nervous.
British aristocracy (male):
Do Men Ever Visit Boston?
Duke Marquis Earl Viscount Baron
Military
Another Damned Bugler’s Reveille Before Cockadoodie Sunrise
Army-Division-Brigade-Regiment-Battalion-Company-Squad
A fourth-grade mnemonic I still use-
HOMES
Huron Ontario Michigan Erie Superior
For memorizing the first several digits of pi:
May I have a large container of coffee?
Taking the number of letters in each word, we get 31415926. You have to know where to put the decimal.
For the Eight is Enough Kids:
Dumb Martians Just Sit Nearby Eating Tender Noodles
David Mary Joannie Susan Nancy Elizabeth Tommy Nicholas
Remembering the months of the year: count on the knuckles - and the spaces between - on one hand ( excluding thumb) then start on the other. When you count on a knuckle, that month has 31 days. When you count on a space, 30 (or 28/29) days:
JAN-feb-MAR-apr-MAY-jun-JUL AUG-sep-OCT-nov-DEC.
I grew up with:
Black boys rape our young girls behind victory garden walls. Notable mainly for eliminating the confusion of two consecutive B’s and whether they’re black or brown.
For networking, we have Please Do Not Throw Sausage Pizza Away to remind us of the OSI stack layers - Physical Datalink Network Transport Session Presentation Application.
Or, in reverse, All People Seem To Need Data Processing.
In 10th grade Chemistry class, I made one up for the prefixes that go with hydrocarbons: “My Educated Parents Both Prefer Harry Harrison’s Old Naked Dwarves.” Stands for meth-, eth-, prop-, but-, pent-, hex-, hept-, oct-, non-, dec-.
In 9th grade Biology (22 years ago!) I made up “Corrupt The Last Sacred Cow” to remember the types of vertebrae: Cervical, Thoracic, Lumbar, Sacrum, Coccyx.
Finally, when I first moved to Memphis in 1995 I could never remember where certain streets were in relation to each other. (I have zero sense of direction.) Finally I remembered “UMP,” because in order, traveling north from the house I lived in at the time, the major streets were Union-Madison-Poplar. I still mentally refer to this at times.
Similarly, the knuckles and spaces of a hand can help you count the days of the week - on the left hand, the pinkie knuckle is Sunday, the next dip is Monday, etc. and the knuckle of the index finger is Saturday. Number them with the date of the month (e.g. for this week the pinkie knuckle is 25, the first dip is today, the 26th, etc.) and you can very easily work out the dates of the next few weeks, or the weeks before.
I’m not good at coming up with these, but my wife came up with one for the elements of negligence:
Dumb Blondes Can’t Dance
Duty, Breach, Causation, Damages.
And the strings on her fiddle and my mando are:
God Damned Assholes Everybody.
Well, she claims the last word she uses is “everybody,” and that it hadn’t occurred to her that my first name begins with an E.
I don’t think I’ll ever need a mnemonic for this. My Torts professor came into class every morning and wrote in big letters on the blackboard:
Duty
Breach
Harm
Cause-In-Fact
Proximate Cause
Then he would circle the one we were currently working on. Clearly it worked; I can rattle these off as easily as the days of the week. (The list is slightly different from yours, but either will work for a negligence analysis.)
Bogbrush:
Blue Orange Green Brown - pair colouring in TIA/EIA-568-B wiring.
Typing “separate,” I still have to mentally remember, “There’s a rat in separate.”
“Thirty days hath Septober,
April, June, and no wonder.
All the rest have peanut butter,
All except my dear grandmother.
She had a little red tricycle, but I took it.”
–Napoleon XVII, appoximately 
We were taught: kings play chess on fat girl’s stomachs.
For movie geeks,
Violent Boys Battle Bandits, Defend Mexican Citizens
to remember the names of the actors playing the Magnificent Seven, i.e.
Robert Vaughn, Charles Bronson, Yul Brynner, Horst Bucholz, Brad Dexter, Steve McQueen and James Coburn
Similarly, I learned that the school’s principal is your pal, while a principle is a rule.
How I need a drink, alcoholic in nature, after the heavy lectures involving quantum mechanics!
I don’t use it much, having memorized what it stands for, but I love its cleverness.
Pi to 14 decimal places (hint: count the letters in each word0
My 11th grade Biotechnology teacher (yeah, weird HS) taught us the different types of DNA molecules or whatever they are as TAGC, because he used to be a Teaching Assistant at Grossmont College. I thought to myself, “Ha! I am never going to remember that, and I’ll never be so lame as to go to Grossmont College.”
Little did I know…
Reminds me of a song my second-grade history teacher taught us to remember the thirteen original colonies. Can’t remember the damn song, of course, but we loved it.
In all seriousness, just the other day I heard a jazz singer described on the radio as having a voice made of “14 karats of gold”. It suddenly hit me like a axe in the face: 14 karats of gold in a fire proof…um…what?
I combed through several pages of Google results for “fire proof” looking for a word starting with a D that would come after it. I found “fire proof door”, but that didn’t make sense. Damnit!
For classification of stars (O,B,A,F,G,K,M):
Oh, be a fine girl, kiss me!
Another spelling rule: I have a hard time with “Connecticut.” Someone told me to think of two linemen repairing a phone line, and one yells to the other, “You connect, I cut!”
First five stages of meiosis: Leaping Zebras Pounce Down Drains, for leptotene, zygotene, pachytene, diplotene, diakinesis.
Here’s a mnemonic, but darned if I remember what it’s for: Egad, My Tiger Has Cancer. I think it’s for something in biology.
mnemonic: Tim Speaks of Stately Treasures when Defending Attorneys from cultural Commercials.
Presidential Order of Succession after Pres and VP:
President Pro TemPore of the Senate (homonym, and if not the VP obviously)
Speaker of the House
Sec. of State
Sec. of Treasury
Sec. of Defense
Attorney general
Sec. of Agriculture
Sec. of Commerce