Some advice from Miss Havisham
From The Well of Lost Plots, by Jasper Fforde:
Havisham beckoned me over to her desk and indicated for me to sit.
"Firstly, congratulations on becoming a full Jurisfiction agent."
"I'm not ready for this!" I hissed. "I'm probably going to fall flat on my face!"
"Probably has nothing to do with it; you shall. Failure concentrates the mind wonderfully. If you don't make mistakes, you're not trying hard enough."