Practice is everything. This is often misquoted as Practice makes perfect.

Practice does not make perfect. Only perfect practice makes perfect.

School is practice for the future, and practice makes perfect. But nobody's perfect, so why practice?

School is practice for the future, and practice makes perfect and nobody's perfect so why bother.

How do you get to Carnegie Hall?”
“I-95.

People believe practice makes perfect, but it doesn't. If you're making a tremendous amount of mistakes, all you're doing is deeply ingraining the same mistakes.