I love this story of a billionaire that finally succeeded in giving away most of his money.
I am generally not big on happiness-seeking, but I think it is worth noting that I have never heard anyone say or show that amassing a ton of wealth has made them happy. On the other hand, I have never heard a person say that giving a lot of money away has not made them happy. In fact, the more people give away the happier they seem to become. Test this-see if you can find a sad person who has given freely from their abundance. There are none. See if you can find a sad person who has hoarded all their money. They are everywhere.