I was trying to play 3 hole stretches in no more than 2 over since I tend to lose focus. It was working pretty well, but of course once you make a double or triple you've likely blown those 3 holes.
I have had my best rounds not knowing what my total was, but it's hard not to know. There's that line where you want to be distracted so you don't know what your total score is, but not so distracted that you don't focus on playing your current shot well.