P ublic awareness regarding the importance of disclosing and managing conflicts of interest (COIs) during the development of clinical practice and public health guidelines is growing, owing to recent high-profile news stories within and outside Canada. 1-9 Despite the existence of guidance on the development of high-quality guidelines, 10 and although a broad range of standards, principles and policies have been developed for mitigating the effects of COIs on guidelines, 11-19 specific approaches vary widely among guideline producers. Some organizations take a stricter approach-excluding participants with any COI from guideline development-while others have no publicly available policies to indicate how COIs are managed. 20,21 We discuss best practices for managing COIs in the development of health guidelines, drawing on the approach articulated by the Guidelines International Network (GIN), 12 as well as on an environmental scan of the Canadian and international landscape, interviews with Canadian guideline developers and feedback received from various stakeholders through a Canadian Institutes of Health Research (CIHR) Best Brains Exchange 22 (Appendix 1, available at www.cmaj. ca/lookup/doi/10.1503/cmaj .200651/tab-related-content). We also provide an online toolkit to support the implementation of robust processes for COI management (https://wiki.gccollab.ca/PHAC_ Conflict_of_Interest_Toolkit_for_Guideline_Development)..