When I'm home on a break I lock myself in my room and play guitar. After two or three hours I start getting into this total meditation. It's a feeling few people experience and that's usually when I come up with weird stuff. It just flows. I can't force myself. I don't sit down and say I've got to practice.
My overnight success was really 15 years in the making. I'd been writing songs since I was 6 and playing in bands and performing since I was 14.