The following is an excellent TED Talk that I think everyone should watch. The best parts, imho, are the practical pieces of advice crammed in at the end. But the whole thing is great.
The advice is age-old advice, timeless advice that sages and saints have passed on to us for about as long as we have any recordings from humans. It has been given in many forms. Here, a bit of scientific research backs it up. I like the science touch, and think it could influence a subset of people who aren’t drawn to the teachings of sages and saints.
So, cutting the rambling, just watch this video: