When breaking camp, after the checklist, I walk around the trailer and look at all the panels for all the systems, which will allow me to free-associate and make sure that some things were done... Example.
Fresh water - pump is off?, water heater is off? (dishes are washed with water: Did I secure the dishes?)
Fridge - Did I turn off the propane? Food secure? (Food: Did I take out the trash?)
Water heater - pump is off?, water heater is off? propane is off?
Just allows me to do the same checks that I always do, just with a different perspective. Sounds silly but it works for me.