The document lists 15 habits that can increase happiness. Some of the key habits include savoring moments through mindfulness, practicing non-judgment of oneself and others, connecting with other people to combat loneliness and gain perspective, sharing gratitude with others, spending money on experiences rather than things, simplifying life to reduce stress, and living authentically according to one's values. Practicing these habits may boost happiness as happy people tend to engage in behaviors that further increase their positive mood and outlook.