Hedonic Adaptation says that we are made happy by getting stuff and then we "go back" to regular old whatever. (See Hedonic treadmill) So if we know what happiness is (let's just say it's 'a joyful, contented life'), then how do we stay happy? Y'know who might know? the Amish.
As a comedian, you have to start the show strong and you have to end the show strong. Those are the two key elements. You can't be like pancakes. You're all happy at first, but then by the end, you're sick of 'em. --Mitch Hedberg