Walks occupy enough of my mind to let it only have one or two conversations going on inside it at a time. It also stops me from doing lots of other things, and

Walks occupy enough of my mind to let it only have one or two conversations going on inside it at a time. It also stops me from doing lots of other things, and removes the feeling of "oh but you should also..." because I can't, I'm not at the computer. Those combined means that while getting some gentle exercise I can properly think through some things.