The simplest things in life are free, goes the saying. I don’t whether this is also a saying, but the greatest joy and the greatest beauty can also be found in the simplest things.
Good food, good music, a glass of wine, stimulating conversation. Silence. A sunset, a sunrise, a thunderstorm, a mountain, a forest, the desolation of a desert, a full moon, a starry sky. Walking.
if all else fails...use a hammer 