When to say 'yes' and when to say 'no'.
Learning to observe when and how and why you say 'yes' to people or to life is as important as figuring out when and how and why you say 'no'.
If you habitually go along with what others suggest or expect perhaps it's time to draw clearer boundaries and learn to say 'no'. But if you habitually keep others and new input at arms' length, the time may have come for you to dare experiment a bit more with new things. It's up to you to decided when to say 'yes' and when to say 'no'. It's your life and the consequences are yours to live with too.
Thinking a bit more deeply about your habitual attitude to affirmation and negation or refusal, is usually very productive in learning to live more deliberately. Dare to experiment, to figure it out.