I know something about you without knowing you. I bet you spend A LOT of time in your head. You know, thinking, worrying, stressing, freaking out — call it whatever you want. I call it a preoccupied mind. And with what? 99% of your thoughts are useless. William James put it best:All my life I’ve been obsessed with practical things. Practical philosophy, practical knowledge, practical books, practical work, and practical advice.