Values are what you’ll stand for when it costs you something. If it’s easy, it’s a preference. If it’s hard, it’s a value. You don’t need 20 values. You need 3 you can defend.
Reflection:
What 3 things would make you uncomfortable if you compromised them?
When have you sacrificed one of these before? How did it feel?
What would change if these 3 were non-negotiable?