" Sometime this week, make a list of all the things you spend significant amounts of time doing. Place the things you regret doing in one column and the things you do not regret in another. When you feel bored or compelled to spend your time doing something, see if you can substitute something from the first list with something from the second. It’s not easy, but the exercise may prove illuminating. It doesn’t matter if you fail; what matters is that you think about your decisions, rather than pressing switches with no curiosity at all. "

― Hugh Howey , Wayfinding Part 1: Rats and Rafts (Kindle Single)