I'm not the poster you replied to, but it's a very good book on both how to be happy (somewhat) and when you're most likely to be happy (most of the book, and m

I'm not the poster you replied to, but it's a very good book on both how to be happy (somewhat) and when you're most likely to be happy (most of the book, and most of the examples). It's short on hard research, but provides a lot of good generalities, and some excellent starting points for finding the hard research. Overall, it's a quick, light read and I'd recommend it as such. It's not life-changing, but it's a great little overview of modern research on happiness, and on many kinds of common, widespread irrational behavior, along with an occasional bit of how to avoid succumbing to it.