The most valuable thing you have is your attention. Take care of it. Don't give it away. Don't exchange it for things you don't need. Use it wisely.
Completely agree. Mine was destroyed in work related incident many years ago. They don't grow back once gone, but they can be honed if well tended.
@LearnTribe I'm finding books and being outdoors really helps. Sometimes both at once. Sitting by a river watching the wildlife is lovely.