I tend to run when I take a lunch instead of shoving food in my face (I sit at a desk, I can do that whenever I want), and almost all my "break through" moments happen on the treadmill. It's a little frustrating, to be honest. All I'm trying to do is to not think about running, and consequently how much I hate it. BAM! Something clicks, and the solution to something I wasn't even thinking about comes to mind.