Feeling relaxed, in the present moment, and happy is the way to stay healthy. There are many ways one can de-stress. Of course, one way is to have Reiki sessions. But for those that this isn't an option, try watching fish aquariums. Watching fish move in the water is highly soothing.
Here I have created a Youtube video of "Dancing Jellyfish". Watch this if you have no fish aquarium to watch.