To live a more balanced existence, you have to recognize that not doing everything that comes along is okay. There’s no need to overextend yourself.
All it takes is realising that it’s all right to say no when necessary and then focus on your highest priorities.
This concept is about life management as well – your purpose, values, roles, and priorities. What are “first things?” First things are those things you, personally, find of most worth. If you put first things first, you are organising and managing time and events according to the personal priorities you established.