A mnemonic device can be described as:
...a memory aid. Mnemonics are often verbal, something such as a very short poem or a special word used to help a person remember something, particularly lists. Mnemonics rely not only on repetition to remember facts, but also on associations between easy-to-remember constructs and lists of data, based on the principle that the human mind much more easily remembers insignificant data attached to spatial, personal, or otherwise meaningful information than that occurring in meaningless sequences.
My most scienc-y mnemonic that I've actually used to remember stuff that I should have memorized in school (had I been paying attention*).
King Phillip Came Over For Grape Soda
Do you have any mnemonic devices that you use semi-regularly or frequently? Science-related mnemonics?
Do tell, DearReader, do tell....
*Apologies to Whad'ya Know?
[h/t: Steve and RPM who reminds me of this post from which you can see my memory blows.]