Thinking too much, not doing enough

I think that I need to think less and do more. I’m not sure where the idea got into my head, but the phrase “You will be judged on your output” seems to be stuck in my head. It occurs to me that my output is very low right now, but that the amount of effort going into that output is very high. It seems as if I could generate much more output from the same amount of effort. Odd that.