I've held onto little musical sketches that I thought could be useful, and the more time that I spend doing them for each film, then the more I have to draw on.
Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work. And the only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle. As with all matters of the heart, you'll know when