In a 2014 survey of UK research-intensive universities, 92% of researchers said they used research software and 68% said their research would be impossible without software. Yet 71% have had no formal software training, and few are ready to apply many of the things we consider as best practice in research software development. The UK's Software Sustainability Institute has worked at the forefront of activity to address these issues, providing guidance and training whilst developing ways of supporting sustainable communities of practice. My talk will challenge the workshop attendees to understand how they can work with their own communities to improve the ways that software is used and developed, including infrastructure, incentives, overcoming fears and increasing adoption, and planning for change.