This article reports on the changes made by people with cancer in terms of improving their lifestyle habits following a cancer diagnosis. It also outlines the help they received from health professionals to make these changes. A general conclusion provides some food for thought that may be of interest not only to the various stakeholders involved in the fight against cancer in Québec, but also to those involved in the promotion of healthy lifestyle habits. The data presented in the article are taken from the Survey on the Quality of Services in the Fight Against Cancer, 2008.