The Buddha’s teaching identified several characteristics associated with everything we experience. Those characteristics include impermanence and our sense of self. When we don’t see those clearly, we often experience stress and dissatisfaction.
Sean Oakes, a teacher at Spirit Rock, describes the three characteristics of conditioned experience. He also offers some suggestions for practicing with them, primarily through becoming more aware of impermanence. You can find his article here: The Three Characteristics
Toni Bernhard is a former law school professor and student of Buddhism whose life was changed by chronic illness. That experience forced her to take a closer look at impermanence and stress and suffering than she would have liked, but learning a new relationship to illness and suffering changed her life. She wrote an article that looks at the way she learned to respond to various forms of pain and suffering, and offers a practice that has helped her change her relationship to suffering, and to suffer less. You can find her article here: Deep Dukkha