Acknowledge your fears, and recognize that they are useless and unnecessary. Part of what undoes us is the belief that when we get to the moment we will be insufficient, that we wont have what we need. Fear is weakness. We perpetuate fear by constantly anticipating the next moment rehearsing the future and replaying and regretting the past. All this perpetuates weakness.
Strength is found in the moment.
We live our whole lives before and after. But the moment is the only thing that counts. The memory works when you are present. What you need to know will arise spontaneously. People ordinarily believe, assume, that they are awake continually conscious.