“Here’s a strategy I’ve found useful for learning dry and difficult material quickly. At various times, I’ve used it to build up my knowledge of subjects like economics, investing, writing and computer programming languages. Some people have been surprised at how fast I can learn these kinds of skills, but I think anyone can do it with the right plan. Of course, you can use this to teach yourself interesting things as well, but most people don’t have any problem learning stuff that’s fun.”