"Master the basics." and "Practice every day. It takes at least one thousand repetitions to master a motion."
Not so serious principles:
"The after class brandy is almost a tradition..."
And, my personal favorite;
GM; "We got some pakalolo bra, you wann puff?"
Me; "Uh... lemme raincheck till after the seminar. I want to be fresh in my head."
Miss those guys.
"Aim for the head"
The best advice so far I have rec is "Relax and breath"
"stop watching all the flashy **** by that pot smoking dickhead on youtube and do what I tell you" - My BJJ Coach
"loose weight fatty" - Wife after pointing out how I look in a Rashguard
Me: How do I get out of this position?
Instructor: You fucked up a long time ago if you are in that position.
Me: ok, so what do you suggest?
Instructor: Don't **** up so much.
Seriously though...I've got the best instructors on the planet...Two Royce Gracie Black Belts who are among the most down-to-earth and helpful people I've ever me.
When new people have come to the sparring group (weapons), the piece of advice I've given with the biggest effect is telling people "Fight like you've got two hands."
Me: It hurts when I do this...
Dad: Well, don't do that.
"Ditch the bitch"
talking about my (then soon to be) ex-wife
After dislocating his collar bone:
"No, I don't go to the doctor after MA injuries, I wear a Tapout t-shirt until I feel hard again."
The first words my Guro told me, in my first class...
"I do not teach knife defense, I teach knife offense. To protect your own life, I gotta teach you how to take a life."