Get enough exercise and sleep: Sounds trivial, but it's not. You may have the urge to work 24/7, to skip the gym and to stay up late to get a few more things done. That's short-sighted. Exercise and sleep are critical to having the physical and mental energy necessary to meet a challenge.

We must exercise ourselves in the things which bring happiness, since, if that be present, we have everything, and, if that be absent, all our actions are directed toward attaining it.

Enthusiasm is more important to mastery than innate ability.

Money. It's a good servant but a bad master.

Happiness comes not from having more, not from having less, but from wanting what you have.

Happiness can seem like an abstract, transcendent notion, but in fact, I found that getting enough sleep (very important!!), getting exercise, not letting myself get too hungry, not letting myself get too cold (I'm a person who is always cold), made a big difference. Partly because I felt happier, partly because feeling physically comfortable makes it easier to keep other difficult happiness-boosting resolutions like biting my tongue.

Reading makes me happy.