The worst is trying to repair one end of an existing cable and having to think really hard about whether to use A or B wiring.
That was my introduction to wiring up CAT-5 cables and rj45 connectors and, with so many to make, I needed a way to remember the wiring diagram without having to read it over and over or use a visual reference. The mnemonic rhythm I used to remember the pattern was "orange/white, orange... green/white, blue... blue/white, green... brown/white, brown". Of course, said out loud, you couldn't tell if it was "orange/white, orange" or "orange, white/orange" and I kept confusing the rest of the team when I'd say it, but it worked for me.
This was circa 2005/2006 and I still say it like that. It just stuck.
Orange
Stripey green
Blue
Stripey blue
Green
Stripey brown
Brown
Thanks for the memories!