Inspired by movements like #Code4Good and ideas of the quantified self, people in technology are engaging with a wide variety of causes for the “greater good” — including the development of mental health technology. However, designing for mental health management is tricky to get right and potentially dangerous if implemented incorrectly. Based on Velvet's research, this talk will signpost and offer insights of how to approach the development of self-care technologies. This includes an exploration of participatory design, societal stigma of mental health and asking what “doing good” actually means.