I found this gem here. It makes so much sense for an over-thinker like myself: worried, self-centered, angry, scared, stressed out, hopeful, desperate.
We eat only when we are hungry, we walk only when we need to go somewhere, we talk only when we need to express; but we go on thinking with or without any need. This consumes a lot of energy. Effortless silence obtained through meditation seems the best remedy.