Say yes to things that:
Will make you proud.
You can finish.
You can put your heart into.
Help you progress.
Create lasting, good habits.
Develop lifelong relationships.
Say no to things that:
Replace good habits with bad.
You’ll need to hide from the people you love.
People you don’t know or trust tell you to do.
Distract you from doing work that really matters.
You can’t do well.
Will give you only immediate returns and will not matter in the long run.
Will make you compromise.
...It helps when you prepare before hand so that the decision is easy when a choice presents itself.