Be A Sponge
Some of the best advice I've ever received is to learn as much as you can in every circumstance you encounter, no matter what. Seems pretty obvious, I know.
Over time it has manifested for me into these three thing.
Ask & Listen:
This is so simple it shouldn't even have to be said, but it has to be said. Ask questions without expectations, then listen to that person exactly as they are and exactly as they are not.
Where are they coming from? What is their point of view? What can you learn from it?
How do people you admire handle situations? How do people you don't admire as much, handle situations? And what are the outcomes of each? Observe as much as you can and you will see patterns in what works and what doesn't—especially in the work place, but also in a relationship, an encounter on the subway etc.
Take everything you've absorbed and keep what you think works, be mindful of the things you think don't and do this process forever. Because they say you learn something new everyday.