Eudaimonic theories of well-being assert the importance of achieving one’s full potential through engaging in inherently meaningful endeavors. In two daily diary studies, we assessed whether reports of engagement in behaviors representative of eudaimonic theories were associated with well-being. We also examined whether eudaimonic behaviors were more strongly related to well-being than behaviors directed toward obtaining pleasure or material goods. In both studies, eudaimonic behaviors had consistently stronger relations to well-being than hedonic behaviors. Data also provided support for a temporal sequence in which eudaimonic behaviors were related to greater well-being the next day. Overall, our results suggest that “doing good” may be an important avenue by which people create meaningful and satisfying lives.