If you can't take the time for a vacation right now, or even a night out with friends, put something on the calendar - even if it's a month or a year down the road. Then whenever you need a boost of happiness, remind yourself about it.

There are some conditions where you have to trust your intuition.

If you care about being thought credible and intelligent, do not use complex language where simpler language will do.

I used to hold a unitary view, in which I proposed that only experienced happiness matters, and that life satisfaction is a fallible estimate of true happiness.

Most things that couples disagree upon aren't worth more than a day's combat.

There are domains in which expertise is not possible. Stock picking is a good example. And in long-term political strategic forecasting, it's been shown that experts are just not better than a dice-throwing monkey.

A general “law of least effort” applies to cognitive as well as physical exertion. The law asserts that if there are several ways of achieving the same goal, people will eventually gravitate to the least demanding course of action. In the economy of action, effort is a cost, and the acquisition of skill is driven by the balance of benefits and costs. Laziness is built deep into our nature.