Saying no makes the difference between a packed schedule and an open one. It makes the difference between having too many tasks and having just the right amount. It makes the difference between working crazy hours and hitting deadlines without stress.
The difference between living a life of peace and productivity versus a life of stress and resentment could lie in one simple skill: Learning how to say no.
https://hbr.org/2019/03/9-ways-to-say-no-to-busywork-and-unrealistic-deadlines?ab=hero-subleft-1