Tire pressure before each trip. Wheel bearings at least once a year. Visual inspection of sides and underneath as part of stocking up for a trip.
Fire up the fridge days in advance. Pack full so nothing topples while underway.
Secure anything that can fall, roll or generally create a mess while underway!
Lock (not just latch) the door and storage compartments.
<<Usual stuff about hitching up and double-triple checking>>
TT 2015 19RD "TheJayco"
TV 2003 F-350 "Montblanc" - Housebroken chore truck
Sitting in The Cheap Seats.
And proud of it!