Learning how to bail properly.
Be smart about choosing your battles.
Don't force it if it's not making sense today.
Be intentional with what you do; I often got injuries when I was just dorking around.
Get your gear dialed, figure out what you like and stick with it. When you look down at your clothes/board, you should be happy and feel confident like you know what you're doing.
Watch closely how other people set up for tricks and don't be afraid to play around with how you set up for things.
Sometimes the tiniest adjustments (put your foot more in the pocket, don't dip your head, get a little wind-up before, pay attention to shoulders and hips, keep your weight on the balls of your feet or toes) make a huge difference.
It's not what you do, it's how you do it (and how that compares to how you visualized yourself doing it)
Visualization in the first place: see yourself doing it and walk through how it will feel when you're doing it.
Pay attention to your back foot (on flip tricks).
Most importantly, do everything you can to avoid long-term frustration and getting upset with yourself. Do the little things that feel good to you and push yourself strategically on only a few tricks (i like the Cab rule of 3 tricks, never heard of that), trying things that are within your ballpark.
Jump WITH the board.