How to deal with failure?

Fail often.

Not the kind of failing in exams, or making a disastrous life decision.

Rather the smallest of things.
Asking a stranger for money.
Greeting a stranger in the elevator.
Sending that cold email to the CEO of the company you want to work with.

Worst case? You will fail.

Great. That is the intention.

However, in it will you understand how to build the muscle of dealing with failure. Which is what you were looking for – how to deal with failure.