A key aspect of most stress release techniques is the ability to train the mind to quiet and observe without judgement. The core of meditation. You can do that while showering, taking a long bath, going for a walk, exercising, or simply sitting still. The more you can train your mind to quietly observe without judging, and realizing that whatever is happening around you is temporary, the less likely you are to attach meaning and emotion to it. You realize that everything we experience is transient. It will all pass into stardust. Just like we will.
