Natalie Goldberg is a writer. And she says as a writer, you have to write every day. In her book
Wild Mind, she says people who attend her writing seminars often ask, "What do you do with what you write?" Her answer is, "What do you do after you drink a glass of water?" She's saying writing isn't something always do to get somewhere. You do it because you're a writer and writing's what you do.
Van Gogh didn't sit down and decide to paint masterpieces. Most of his work that's hanging in museums he saw as practice. Here's what he did when he was experimenting with what he saw outside his sanitarium window:
Sometimes we create amazing things. Sometime we create garbage. The point is to keep creating.
