Skills are a person’s toolkit: each one you add makes you stronger and lets you operate on a higher level. Few skills are truly useless. As long as you can combine one with others, it can become part of a multidimensional competitive edge.

Music, chess, calligraphy, and painting are often dismissed as “refined pastimes.” But think about it: people who master these skills can apply the ways of thinking behind them to other pursuits and be just as accomplished—sometimes experts from the get-go. A sense of rhythm in getting things done, a big-picture perspective, the tactics and strategy of conquering new ground—which of these isn’t connected, or even fundamentally the same?