Last week I cleaned up my office. The uninitiated might walk into that room today and still say it looks like a mess. But if you had seen it two days ago, you’d know I made a dent in the piles of work/books/papers that stack up and accumulate over time. One of the biggest jobs in cleaning my office is working on my bookshelf. When I got married, I had one bookshelf. It got full, and Bill bought two more. Now those are full, and over time, books...