In other words what have you committed to say yes to? What is most important to you? Family, Career, Love, Travel...? What are the things you won't give up? Make a list and post it with your calendar. When you are asked to take on more, when you are tempted by learning or doing something else...consider if you will have to neglect these Foundational Yeses. How many balls can you juggle? If you can't juggle, or can only handle so many balls, then you know your answer needs to be no. If the new thing(s) is more important than something else you have already said yes to, are you willing to let an old Yes go?
I encourage you to make your list. Follow your bliss and learn this time management tip. I think it will help you with decisions, time management, and overwhelm. You are the lead player in your life, base your choices on that fact. Be the lead player not the supporting player. It is the only way to win the prize.