The stoics for example have a practice where they deliberately deprive themselves of basic things like food and warmth in order to appreciate those things more when they do have them.
I wanna ask this person on a date. What's the worst thing that could possibly happen? They say no and I feel embarrassed. It's a lot easier to do scary things if you actually think about the consequences of failure, rather than letting animal fear control you.
This, I learned from the Stoics.