I was washing dishes the other day thinking about stuff, I have no idea what, when suddenly this random thought popped into my mind, "I'm wasting my thoughts!". Is it possible to waste your thoughts, like you waste your time? I actually don't know. It was the weirdest concept I had heard of, (except that I didn't really hear of it.) But if my thoughts are supposed to be focused on God, and instead I am thinking about what happened during the day, what I'm doing on Friday, my friend's new job, etc., then maybe it really is possible to be wasting my thoughts.
I have no idea if that makes sense or not, but I thought I'd just throw that out there...
For as a man thinketh in his heart, so is he. Psalm 23:7