This is very site and production specific, so you should make your own decisions, but here's some of the general things I came up with:
Daily or even more frequently: Food contact surfaces, scoops. Restrooms, especially handwashing areas, ensure that there is soap and paper towels always. Empty all garbage. Clean employee eating area, fridge and microwave.
Weekly: mopping of floors, cleaning of mats, cleaning of pallets, sweep yard/parking area
Monthly: Flush drains. Clean, mop offices. Forklifts/pallet jacks, clean. Some exterior stuff, like weeds. Note that this is different from the Monthly Inspection.
Yearly: I got rid of the Yearly checklist and made a section of "Seasonal" items on the Monthly. Mostly making sure the roof drains aren't clogged.