1+1=3. Two people who collaborate well will be about three times as effective as each of them operating independently, - Ray Dalio

Learn how much confidence to have in your people — don’t assume it. No manager should delegate responsibilities to people they don’t know well.

Watch out for people who think it’s embarrassing not to know. They’re likely to be more concerned with appearances than actually achieving the goal; this can lead to ruin over time.

My approach was to hire, train, test, and then fire or promote quickly, so that we could rapidly identify the excellent hires and get rid of the ordinary ones, repeating the process again and again until the percentage of those who were truly great was high enough to meet our needs.