“When you sit down to finish something, whether it's an explanatory email, a new product design, a research report, or a fundraising strategy, it can be so tempting to do more research. It's so easy to open up dozens of browser tabs, order more books, or go off in completely new directions. Those actions are tempting because they feel like productivity. They feel like forward progress when in fact they are divergent acts that postpone the moment of completion.”