Inspiration

Where do you find inspiration? For me, I’m on the bus thinking or in the shower or zoning out. Inspiration strikes ar the oddest times too. I have a long list of topics but only once in a while actually want to write. I really wonder why I cannot just see a topic and run with the ideas for it at random? I enjoy writing, in fact I enjoy it a lot. My writing on my blogs is purely for fun so there are no hard deadlines maybe if it was for a solid reason with a deadline I’d want to write on each site more often.
Why do you write and how do you keep your muse engaged in the writing process?