Creativity is inventing, experimenting, growing, taking risks, breaking rules, making mistakes, and having fun - Mary Lou Cook
Yes! - When I am lying in bed drifting in thought, I will think of a really creative idea or think of something very poignant I want to write. I keep a notebook in the nightstand just for these occasions, so I can capture the thought before I forget. :)
Although those things can be pretty cool too. Algebra is in music. You could study the history of anything. Or even being creative through restoration and conservation. I realise this isn't the point but it's a wee disclaimer that I don't think that there's anything wrong with learning those things. I really like this quote though.