Being "meta", not a in pompous manner, but in a attack all dimensions with simple automation.

See videos like Gary Bernhardt - The Unix Chainsaw on how he gathers very nice data on just about anything in his system with a few pipes. It's easy to try to be awesome in OOP, or in javascript but waste time and energy clicking around or digging manually in repos for information.

I find that is the nicest and most efficient advice I ever took.

The other habit is: improving your maths skills (sophisticated combinatorics, probabilities, statistics) ..