Calmness
Synonyms for calm
http://www.thesaurus.com/browse/calm
Outer order contributes to inner calm. So to stay calm, make your bed, clean the kitchen and put your clothes organized in the closet.
https://www.psychologytoday.com/us/blog/the-happiness-project/201508/outer-order-contributes-inner-calm
Blue is a calming colour.
https://en.99designs.ch/blog/tips/how-color-impacts-emotions-and-behaviors/
To calm body and mind, get moving.
https://www.health.harvard.edu/healthbeat/to-calm-body-and-mind-get-moving
To be calm, listen to music that calms. You have to pick the pieces.
https://www.psychologytoday.com/us/blog/the-creativity-cure/201402/how-be-calm-person
To calm down, breathe slowly.
https://www.theverge.com/2017/3/30/15109762/deep-breath-study-breathing-affects-brain-neurons-emotional-state
Babies calm down and stop moving immediately after being carried.
https://www.psychologytoday.com/us/blog/the-athletes-way/201304/the-neuroscience-calming-baby