I've only cracked 80 3 times and going low(even low 80s) for me has always been about GIRs or at least being able to putt for bird... that could include fringes or just off. I'm a decent putter and am usually in the fairway or just off with my tee shot. I probably don't hit more than around 4 or 5 greens on average, though I haven't really tracked it. I'm usually in the vacinity for a reasonable up & down, though. While my short game around the greens is not terrible, 5-8 feet is about average and no one is going to make 5-8 footers all day, consistently. So I know that chipping/pitching is what I have to work on. It's really what everyone should be spending the most time on... and putting, of course. I was watching TGC awhile back, either Phil or Furyk I believe, and he was saying that the key to his short game was getting it inside of 3' consistently because that's where his % of makes increases dramatically... almost to 100%. This came as somewhat of a surprise to me as I'd come to think that 5-6 footers where almost gimmies for those guys, but that extra couple of feet is actually quite significant. Well to wrap up this ramble, given the current state of my game, when I turn a few of those just off the greens into putts (and stay away from the blow-up holes, of course), is when I go low.... for me.