This chapter describes the fifth Values-Flow skill: REGULATE, which provides the emotional regulation necessary for the deeper work of values-aligned engagement to become sustainable. Emotion regulation is the infrastructure that makes flow possible; you can’t engage meaningfully when emotional intensity destabilises you. We describe emotion regulation and distress tolerance skills from DBT, as well as the ACT perspective that turns away from struggle and towards values-aligned living. We need to feel enough emotion to be engaged while staying regulated enough to function, which the REGULATE skills enable.