Hack — PHP with types, generics, collections, lambdas. From Facebook.
Solve Hard Things Early — Build great habits around communication and decision-making when everyone still knows each other well.
Marginally Useful (Paul Ford) — The last two decades have suggested a post-scarcity economy, where infinite copies of attractive digital things have a price approaching $0. Maybe that was merely a passing moment that we will look back upon with wonder once limited coins enforce scarcity—once the owner of a piece of digital art can look upon it with satisfaction and know with total, cryptographic certainty that because he paid for it, it belongs to him and no one else.