I have been giving the matter a lot of thought.  A 570 may be a good night on some nights, and a 650 may be mediocre to bad on other nights.  Normally because of the conditions.  I have decided to start counting the number of pins I left on the lanes, because ofmissed spares and not getting 1/2 of my split counts. For example, last night I was out of the pocket on only one shot and bowled a 680.  Not bad, however, I missed 1 ten-pin, and missed both pins on 3 pocket 7-10 shots.  Totaled I left 16 pins on the lanes.  We lost series by 15 pins.  My 680 effort doesn't look so good now.  I have been working hard on my spares, but I need to take the percentage on my splits.  I missed them because I was trying to throw the ball harder hoping for the miracle kick out of the back.

THE KEY REALLY IS TO SEE HOW MANY PINS YOU ARE MISSING AFTER A STRIKE OR SERIES OF STRIKES

That is how I counted up 16 pins.  10-pins and splits happen.  It is what you do with them that counts.

well I can tell you last year.... i started out giving it my all, and probably by Nov, I was like ehhhh.....   But a lot of that was the shot that was put out was so easy that you didnt have to bowl well to score well....

This year I am bowling in a different city and in a big money scratch league, and it's man to man scoring...  So every point counts and total pin fall counts too... 

So this year I'm always giving it my best effort...   Execution on the other hand can sometimes be well sketchy lol...  But a lot of that is just having, how should you say different lane conditions lol...  So you really have to be aware of how your ball is reacting.