2014 Tioga Ranger 25G

Get to know your house battery and converter/charger/auxiliary battery switch setup. voltage at house battery terminals should be 13+ volts while converter/charger is charging the batteries with rig plugged into shore power. When un-plugged and with engine running voltage at battery terminals should be 14+ volts. Unplugged and without engine running, voltage at house batteries should be around 12.6 volts. Check electrolyte levels and replenish as needed with distilled water. Find out if your year/model has provisions for charging the starting battery while plugged into shore power. Many brands/models don't have this. Starting battery may slowly lose charge from devices that draw power while parked for long periods. Get a digital multimeter for checking voltages and a "turkey baster" battery filler. A plug-in AC voltage monitor meter is good to check whether shore power is adequate to run roof AC, i.e. in green zone. Have a system to warn you when the TV antenna is up, and stow it before driving. Change lanes on freeways very carefully using mirrors.
Get long solid metal valve stems installed that make checking tire pressure easy, don't use screw-on valve stem extenders.

thanks...I previously had a truck camper that self destructed from water intrusion...

Any exterior screw that the head is exposed on, needs to be backed out halfway and sealed. That includes ones on the bottoms of the inside of cargo door openings. The way to do it is to buy a tube of Proflex RV caulk, and put a dab the size of a pencil eraser on the threads of each screw, then just screw it back in. It will end up under the head of the screw.

Besides the cargo openings, you will find them on the ladder mounts, on many of the things attached to the sides of the MH, and maybe even on the roof, believe it or not.

You might see that some of your windows or other side items have a thin bead of caulk across the tops and partway down the sides. Or even all the way around. This is good! However they don't always do every item. Like say the fridge or water heater flanges. So, if they didn't do every item, do the ones they didn't!

Go up on your roof. Make sure the Dicor lap sealant looks good on all the things up there. Do that 2x a year. If you ever see any cracks, clean the area and dribble some new lap sealant over it.

OK, that is probably not what you were looking for, but if you do those things, and they are easy, your RV will last a long time, body-wise.