A body in motion tends to stay in motion; a body at rest tends to stay at rest.  "Do you remember that one time we sat on the couch?" said no one ever! Leave where you're at better than how you found it.  Just be nice.

I'm old and broken and still adventuring. I have had to change things as I've gotten older and broken things, the key is to keep moving and enjoy the things you like to do. It keeps you young and alert, both mentally and physically.