Senescence is a time of decline; yet many seniors remain active and engaged into very old age. How and why do some seniors live long and keep well? We report the responses to this question from a representative sample of 2,783 Canadian seniors. Overall, seniors placed primary responsibility for their long lives on their own individual practices, citing keeping active and maintaining good nutrition as the major themes. Physical illness was less significant than the will to adapt to illness and avoid further physical decline as long as possible. Francophone and anglophone respondents differed in the frequency with which they mentioned many of the themes. Francophones focused on life quality and family, while anglophones focused on the self. Systematic gender differences were also identified. Many responses validate existing theories of successful aging, and indicate that Canadian seniors are well-informed, insightful participants in the process of growing old. (Contains 2 tables.)