I Remember when i first started out in magic, that was a big problem for me, and the way i
got rid of those jitters was by perfomring for as many people as i could, as often as i could
and dont worry about screwing up a trick, its going to happen to everyone, i have been perfoming
for 15 years. and once in a blue moon i will srew up. but i also learned how to recover from that.