Just think. About what affects you. Go for 1h walk and leave everything at home, except the keys. I usually I commute 1h10m a day, by bus, and many times I jus

Just think. About what affects you. Go for 1h walk and leave everything at home, except the keys. I usually I commute 1h10m a day, by bus, and many times I just think about everything. Sometimes I have to shutdown my phone, or make sure I have no music, 4G, videos, ebooks, so I don't get distracted. You can think about your life, future, past, work "puzzles", economics, politics, friends, family, something you forgot, make comparison between them, etc...