My only focus after I start the putter away from the ball is keeping the back of my left wrist as fat as possible from start to finish. This is critical to keeping the putterhead and ball moving straight down the target line after impact. It's also how Rory Mcllroy squares his putterface, and obviously it works for him.
The generation that I'm in is extremely talented, and those that are still in school, my peers that are my age that will be out here really soon, you guys will see, will make a pretty easy transition on the PGA Tour. I don't think they will have a problem at all. The game is getting younger, and the game is getting better.
Older guys on Tour tell me that if they could go back and change one thing about their game, it'd be to learn how to putt cross-handed from the beginning. It truly is the best way to roll it. Placing your left hand below your right on the handle makes it easier to set the face square to the line at address and keep it square during your stroke.