Are you sure you're just zoning? Most of it should have pushers installed, making it take minimal time and effort to zone. Most stores should have a full grocery team that does everything including pushing the truck, pulling batches, and backstocking.
Anyways go-backs are pretty straightforward. Fresh stuff still has locations, but for most of it you can probably just take a look around and find where it goes (unless you're a super target). Obviously don't put back anything that's out of temp or damaged/bruised.