This guide is specifically tailored for facilitators, co-chairs, and community managers working with RDA (Research Data Alliance) Working Groups (WGs). Drawing on lessons from the RDA TIGER project, it provides insight into how facilitation can accelerate WG effectiveness, help navigate RDA structures, and maximise impact. Purpose and Audience: Support future facilitators (e.g., RDA regional initiatives like TIGRUS, or in the context of the RDA Framework for engagement with the private sector) working with RDA WGs. Offer practical, RDA-specific advice based on the RDA TIGER experience. Help WG co-chairs understand how facilitation practices can support their role in leading RDA Working Groups.