Every night for the next week, set aside ten minutes before you go to sleep. Write down three things that went well today and why they went well...Writing about why the positive events in your life happened may seem awkward at first, but please stick with it for one week. It will get easier. The odds are that you will be less depressed, happier, and addicted to this exercise six months from now.

Individual investors predictably flock to stocks in companies that are in the news.

Optimistic people play a disproportionate role in shaping our lives. Their decisions make a difference; they are inventors, entrepreneurs, political and military leaders - not average people. They got to where they are by seeking challenges and taking risks.

We can't live in a state of perpetual doubt, so we make up the best story possible and we live as if the story were true.

In strategic decisions, I'd be really concerned about overconfidence.

My interest in well-being evolved from my interest in decision making - from raising the question of whether people know what they will want in the future and whether the things that people want for themselves will make them happy.

So your emotional state really has a lot to do with what you're thinking about and what you're paying attention to.