I always put on my gear in the exact same order. I always take a run through the park without hitting any of the features in the beginning of the day, even if I'm 99% sure that speed is the same as yesterday.
I never say out loud that I'm sure I'm going to stomp a trick, even if I am.
I can't ski properly if the left and right ski get mixed up. (Poles don't matter)
If I somehow forget to put my back protector on, I'm at least twice as likely to eat shit.
Whenever I attempt anything harder than a 180 I silently mutter a prayer just before reaching the lip of the jump...