I can't pass up a blank book when I see it in a bookstore. And I write a sentence in it, and then I put it away.
Write more. That's the advice I would give myself.
I wrote as a teenager, and once I started acting, you know, you're learning lines, you're doing other people's words, it takes up a lot of time. Especially if you're dedicated to what you're doing, you're trying to do a decent job at it. But I would have said to myself, "Write more, please."
I guess we all have some sort of Rubicon that we haven't crossed in our lives and we've thought about for who knows how long. And for me, it's writing.