I'm not sure if it is the walking, though light physical movement might be a key. I've been making art since I was pretty young, and the topic interests me. An

I'm not sure if it is the walking, though light physical movement might be a key. I've been making art since I was pretty young, and the topic interests me. Any mundane activity can help with creativity, so long as it doesn't take very much brain power. Walking, showering, doing dishes, going for a drive, doing something repetitive. To a certain extent, taking a bus and other things that make you bored or otherwise give you time to think/daydream. I don't know where any of the research I've read is, but I honestly thought this was a known thing already and I'd be interested to see if walking has some sort of advantage over things like washing dishes or driving. Combine this sort of thing with learning and improving your general world knowledge. Learn about things you didn't know about or aren't connected to your work. Learn about other people. Do things that challenge your world view. Other people's ideas often play into this so long as you give yourself time to think about things. I personally think this is why people think drugs make them more creative: There are many drugs out there that can change your perspective on things, even if it is temporary and slight. Alcohol is enough. There more perspective on has and the more knowledge one has, the greater the base is for a person to be creative and combine ideas.