I was deeply fascinated by Taoism in my teens and read all I could find, did tai chi and chigong, and also used many of the practices described by Mantak Chia in his books.
One of these, and perhaps my favorite, was the inner smile.
I am now drawn to it again, and am reminded of how much I enjoy it and how transformative it can be.
Here is the brief description, as I remember it:
Smile in your mind to each of the organs and systems in your body. Smile to the eyes, ears, nose, mouth, brain, brain stem, nervous system, lungs, heart, kidneys, and so on. Take time with each one. Do this is the morning, and later in the day if you are drawn to it.
This is a heart-centered practice that helps shift how we relate to our body, and I notice how it shifts how I relate to myself and life in general. Knowing that mind and body are aspects of the same seamless system, it most likely also supports our health.