This is a great thread. I started getting back into golf this year after a very long hiatus, and my first few rounds had a whole lot picking up short putts, not counting penalties, mulligans and basically lying to myself about my score. I started practicing at the range and playing 9 holes once a week and started noticing massive improvements, especially once I stopped keeping score.
My last two times out I shot a 99 and 102, but that was putting out every hole, counting my penalties and no mulligans. Now at least I know that I am a terrible putter (seven and six 3 putts respectively) and that I am doing a much better job of keeping the ball in play. Lying to myself and telling people that I shoot in the 80s isn't going to improve my game, but actually knowing where my game is at so I can address my flaws is what is going to help me improve.
BTW, I just picked a number for my handicap. I don't even know what mine is at this point.