This sounds like a really simple thing, but if you look at Foden's goal, Sterling waits and waits to give the pass until the exact moment the defender closest to Phil stops running backwards and has to try to challenge Sterling.
It's a tiny little thing, but just waiting that extra couple of seconds to give the pass means there's no chance of the defender getting anywhere near Foden and he has plenty of time to weigh up the shot.
Those are the kinds of little things Sterling wasn't doing 18 months ago, he'd give it as soon as the pass was on, and then the defender would have a chance to block the shot or get across.
This season he's just doing things like that. He's not just picking the right pass, but he's also timing things perfectly, or sometimes disguising what he's doing and adding some subtlety.