What do you rolls do to keep a healthy body and mind?
I find that one of the best ways to do both consistently is training yourself in martial arts. An good starting point for learning shaolin kung fu: https://www.youtube.com/watch?v=9f8zb_QKZEo
One of the ways I train mentally is by doing regular meditation. If you are new to meditaion and don't know what style to pick, start with Zazen - https://www.youtube.com/watch?v=LL2XUTeoUsM
(turn on captions). Some other techniques that I like are detailed here: https://tricycle.org/magazine/tibetan-buddhist-meditation/
I think it's important to learn to feel what the chinese call qi. That does not mean you have to become religious or convince yourself that it is anything more than a phychological phenominon, but the reason I think it's important is that it can be used to reach a meditative state even when going about your daily activities. I'm not an expert, but I think a good method is to sit or lie in a position that allows you to breath with your stomach (make sure to remove constraints like belts), close your eyes and take slow, deep breaths with your stomach. As you breath in, imagine energy slowly rising from the base of your spine to the top of your scalp, and as you slowly breath out imagine that energy sinking from your scalp back down to the base of your spine.