skate one's lane

verb2

1. •
   To play in one's assigned position rather than straying to the location of the current action.

   • Wings should skate their lanes and not go roaming about the ice. — 1971
2. •
   To mind one's own business; focus on one's own goals and tasks and not worry about what others are doing.

   • Well, yes, but they're also human beings, fathers, sons, brothers, cousins, uncles and friends. Role players have to skate their lanes off the ice, too. — 2011