Sounds very silly and minimal but I've learned to say "no" and it changed my whole work life. I've gained so much out of it. - respect of my opinion - peace (

Sounds very silly and minimal but I've learned to say "no" and it changed my whole work life. I've gained so much out of it. - respect of my opinion - peace (as opposed to stress) - Massive code quality increase - Meet my deadline more often and probably more... this was life changing