Here’s some important stuff I have learned the hard way, or have read and believe to be true.

Be cool. Be nice. Winners focus. Losers spray. [Not mine.] No matter how far you’ve gone down the wrong road, turn back. [Not mine.] People are selfish. Projects that fight this fail. Projects that harness this succeed. 10% of people are assholes. 10% of people are really nice. Be brief. Latency happens. [Not mine.] Failure happens. Maliciousness happens. The last 20% of the work requires 80% of the effort. [Not mine.]

There’s probably more to be added here…