What does it mean to get things done? In the abstract, you can complete a mathematical proof or a problem set, but the real world is much fuzzier. Suppose I plant a tree in my backyard. Once the sapling is in the ground, is that done? Not really. There’s always more work to do: clearing the ground around it, watering, keeping pests away, pruning, and so on. Programming large web applications is more like planting a tree than completing a mathematical proof. Once you write a service, you can keep...