Language learning deserves special mention. It is, bar none, the best thing you can do to hone clear thinking.

Exercise is overrated.

This is not my phrase, but if you're stuck in the past, then you're depressed. If you're stuck in the future, then you're anxious.

By working only when you are most effective, life is both more productive and more enjoyable. It's the perfect example of having your cake and eating it, too.

With a decrease in the number of pirates, there has been an increase in global warming over the same period. Therefore, global warming is caused by a lack of pirates. Even more compelling: Somalia has the highest number of Pirates AND the lowest Carbon emissions of any country. Coincidence?

I really feel like knife skills - not just in the kitchen, but in life - are really critical.

I discourage passive skepticism, which is the armchair variety where people sit back and criticize without ever subjecting their theories or themselves to real field testing.