This workshop will bring together researchers in the Sustainable HCI (SHCI) field to reflect on sustainability challenges in HCI and collaboratively collate and develop a set of strategies for increasing and accelerating positive impact. We will explore 5 key questions towards this, and produce a collaborative position statement. Our key objective for the workshop will be to begin developing a series of design patterns, which we will ground with 'field trips' to areas of socioecological challenge. These design patterns will serve to provide a resource for practitioners and researchers wishing to adopt a sustainable approach to their work, and provide a touchstone for critique and evaluation of this work. The design patterns will contribute to an evolving, wiki-based repository and form the basis for several collaborative papers.