Thanksgiving can mean a lot of things, from the usual turkey feast to more idiosyncratic and potentially stressful traditions like a Black Friday campout or a death-defying deep fry. The holiday varies from person to person and family to family, causing real problems for anyone who wants to contemplate the True Meaning of Thanksgiving. Is Thanksgiving kind of a downer? For answers, we turn to a sub-discipline called positive psychology, which deals primarily in questions of happiness and well-being.