There is no magic formula except to learn (takes quite a while) where to place the ball on approach. Above the hole is almost never a good idea here. But directly below can be a bad spot as well (example - hole #1- want to be pin high or a bit short, left of hole on approach). The huge breaks from the wrong spots can be intimidating. Honestly, the putts are really not that much harder than say Kiawah on certain holes (where missing a putt inside 2 feet is not uncommon). The more you play it, the easier it gets. At one point I played it maybe 100 practice rounds in a row and after that, it's just another tough course, no different than BPB for example.
Having said that, when you do get it right, the birdies start flowing. I personally have never shot better than 30 there, but for Oakmont, that ain't bad. The other key of course is to hit fairways and greens, as the rough can be horrible. And again, avoid being above the hole on the holes where it can mean bogey instead of birdie (like #2).
Somewhere on here, someone did a hole by hole course management treatise for all the courses. Maybe that would be helpful - someone else might have the link and post it...of course you can play this and make your own notes...