Mistakes. Errors.
Blunders. Bloomers.
Boo-boos. Fluffs.
Gaffes. Goofs.
Slip-ups. Hiccups.

Call them what you will, but they are all learning.
You need to make more mistakes not less.
Because you know that great idea you will have one day, it will come from a bunch of not-so-great ideas first.

Make more mistakes.