The best piece of advice I ever got: focus on the things you can affect. This is advice I’ve drawn on again and again in my career. It’s been a challenge to master, and it’s still a work in progress.
The first time I heard this advice was early in my career. I was working in sales at Accrue Software, and I had highly successful colleague who never seemed the least bit stressed, not even at the end of the quarter. I asked him what his secret was.