There's a tendency, when you're directing yourself, not to give the performance as much care, because you feel like there's too much focus on yourself, or that all these people are just standing around setting everything up, waiting for you.

When we were doing 'Freaks and Geeks', I didn't quite understand how movies and TV worked, and I would improvise even if the camera wasn't on me. I thought I was helping the other actors by keeping them on their toes, but nobody appreciated it when I would trip them up. So I was improvising a little bit back then, but not in a productive way.

Acting is an art form and you want to take roles that are challenged and it's more of a challenge I think to play dark characters. Not that I want to always play those, but it is a challenge and challenges are rewarding and fun.

I might have to stumble a little bit more in public than others, but that's fine, I don't mind, I've developed a thick skin.

I don't teach writing classes anymore, and I'm really glad I don't, because I would feel very strange about telling people, 'Go out there and be a writer, and make a living from it.'

Stepping back into theatre, a childhood dream, I always felt like I would be onstage. I hadn't imagined myself in a composer role... I find it so satisfying to be behind the scenes and writing the music and watching it elevated and characterized by different voices than my own. It's so exciting.

The computer has played a role in destroying creativity with the Photoshop. Everybody thinks they're a designer.

Fartlek, or speed play, is variable-pace running that emphasizes creativity. During a 30-minute run, choose objects to run to - telephone poles, trees, buildings, other runners, whatever. Make choices that mark off different distances, so your pickups vary in length from 15 to 90 seconds, and modify your pace to match the distance.