Meg Cabot, Author. She has written over 50 published books and is best known for the Princess Diaries. Over 25 million copies of her books are in print worldwide, including numerous number 1 New York Times bestsellers.
My advice to young writers is: Write the kinds of stories you like to read. If you don't love what you're writing, no one else will, either. Don't tell people you want to be a writer. Everyone will try to talk of you out of choosing a job with so little security, so it is better just to keep it to yourself, and prove them all wrong later. You are not a hundred dollar bill. Not everyone is going to like you...or your story. Do not take rejection personally.
Read—and write—all the time. Never stop sending out your stuff. Don't wait for a response after sending a story out...start a new story right away, and then send that one out! If you are constantly writing and sending stuff out (don't forget to live your life, too, while you are doing this) eventually somebody will bite!
WritersWrite, Photo via Meg Cabot