Your mouth says "sure, no problem" while your stomach drops because you just overcommitted again. A 2016 study found that learning to set boundaries significantly decreases anxiety and stress. Billy learned this through his "Van Life" experiment, where he and Suzy host travelers in their driveway. After a devil dog attacked Yeti and someone tried to exploit their hospitality, he was ready to shut it all down. Then Suzy asked: "Why don't you just say no to the ones that feel off?" Now they have a "Van Life Vibe Check." Boundaries don't kill good things, they protect them. Start with one small "no" today.