As Anne Lamott turns 61, she published a reflective post on Facebook. The whole post is worth a read, but I found this bit to be especially poignant:
Writing: shitty first drafts. Butt in chair. Just do it. You own everything that happened to you. You are going to feel like hell if you never write the stuff that is tugging on the sleeves in your heart–your stories, visions, memories, songs: your truth, your version of things, in your voice. That is really all you have to offer us, and it’s why you were born.