Bob,
Don't let the check-lists get you down! Use them to ensure you will enjoy each and every day with your rig.
That said, there are checklists to use for the annual maintenance, before a trip after storage, checklists to use before departing on a trip and a daily checklist before departing for travel that day.
You need to determine which items are appropriate for which checklist.
I'll not go into an exhaustive list of items for each of the above three - just some examples.
Annual: Engine & generator fuel & oil filter & oil change (Plus many more)
Trip after storage: everything works - slide(s), A/C, fridge, water pump (clear the water system with a Clorox flush)et al
Departing on a trip - maps, GPS functioning, route plans, and all of your daily items too.
Daily before departure - fuel level & dump water from fuel filter, jacks UP, Antenna DOWN, electric, sewer and water disconnected and stowed, all compartments closed and locked, toad hookup correct and checked, etc, etc.
I would venture a guess that nearly all of us have - at one time or another - missed one or more items on a mental checklist and now have a pilot-like actual checklist. Mine are in plastic sleeves - with a real check-mark in grease pencil.
OH - and be SURE you do not depart the fuel stop with the hose still in the filler! VERY much an embarrassment!! (Please do not ask me how I know this!!)