Be courteous to all, but intimate with few, and let those few be well tried before you give them your confidence - true friendship is a plant of slow growth.
- George Washington, January, 1783
New research shows that when you're optimistic, it lowers your risk of heart disease by 35%. One way to become more optimistic is to think thoughts of gratitude. Thinking of things you're grateful for is a good start, writing them down even better, but sending a note or e-mail to a person expressing your gratitude is best.
My biggest advice is if you feel that what you're working on every day is not really what makes you happy, change. Start finding something else. It may take you six months, it may take you a year. But honestly, don't spend a day of your life working on anything other than the stuff that makes you happy.
- Mo Gawdat, previous Chief Executive at Google X.