This chapter examines a novel approach to mindfulness training, optimized for high‐stress contexts, called Mindfulness‐based Mind Fitness Training (MMFT).® MMFT follows in the lineage of warrior traditions that train the body and mind to cultivate two foundational warrior qualities—wisdom and bravery. Wisdom is the ability to see clearly how things are right now and then to use that information to make the most effective choice in the moment. Bravery is the ability to stay present with any experience, even an extremely difficult one, without needing for it to be different. Together, these two qualities are a pathway toward effective action in any sphere, but especially in high‐stress environments. In line with this lineage, MMFT cultivates attentional control and tolerance for challenging experience—two capacities important for enhancing performance and building resilience in high‐stress contexts. This chapter examines some of the possible mechanisms by which MMFT may enhance performance and build resilience, while ameliorating the detrimental effects of such environments. Next, it summarizes the empirical research to date about MMFT, with troops preparing for combat deployments. Finally, it compares MMFT to other approaches for cultivating mindfulness.