Jane Yolen
If you give up at the first rejection or the first bad review, you will never make it in publishing.
I read everything aloud, novels as well as picture books. I believe the eye and ear are different listeners. So as writers, we have to please both.
It seems like I've been writing since birth! I started writing poems before I got to school. I wrote the class musical in first grade — both words and music. It was about a bunch of vegetables who got together in a salad. I played the chief carrot!
Read something of interest every day — something of interest to you, not to your teacher or your best friend or your minister/rabbi/priest. Comics count. So does poetry. So do editorials in your school newspaper. Or a biography of a rock star. Or an instructional manual. Or the Bible.
My youngest son becomes an award-winning nature photographer, and I cannot resist writing poems to his pictures. My daughter loves to cook, though I do not. Yet together, we write a cookbook with fairy tales. And now a second.
Write every day. You don't have to write about anything specific, but you should exercise your writing muscle constantly.