There are lots, but I'll stick with two:
1. Check your ego. Most of the hairy spots & close calls I've had were because my ego couldn't handle being passed, or a bonehead move by a thoughtless or aggressive cager. Let. It. Go.
2. Strive for smoothness. Smooth is fast, smooth is safe, smooth is easier on motorcycle and you, and smooth just plain looks cool.
ok, I lied, three:
3. Never stop learning (great thread).
Cheers to the n00bs and the geezers.