You've done an excellent job so far, but to truly become an Expert Courier and start earning serious money, you'll need to boost your efficiency. Try handling two deliveries in one run: the first package goes from the cabin near the Farm Town Sawmill to the dried-up well beside the Farmhouse. And the second from the guard room by the east gate of the Northern Factory to the room on the east side of the Sanatorium. Plan your route wisely to make the most of your time.