This kind of goes with thing you never thought about before you started. Only things learned the hard way that would have been nice to know before sarong or you would pass on to someone just getting ready to start since we have several that are still gearing up to start full time in our group.
Full Time RV Living
Tips you wish you had when you started
LOL! So many things I wish I would have known. I wouldn't know where to start! It helped to have a humorous approach to everything, including the first time I hooked up the water (the drain plugs were all off and it was snowing), or the first time I hooked up the sewer line. I wish I'd bought a tt that had a generator, and I wish the tanks were bigger so we could really park off-grid more. hmmm. I'll give this some more thought.
Practice flexibility, declutter. Get rid of just about everything. It is amazing what will come to the surface as important once full-timing.
Something that was handy at first, but then turned out to be HOLYCOWTHANKGOODNESSIWATCHEDTHAT!!!!! was seeing the trailer backing videos. It's important to also watch the funny ones where professional rig drivers also get into a jam ;-)
The last backing adventure I had was on an icy driveway and I had to back through a one-lane driveway, around a cement gatepost, then a tree, and then a basketball hoop. It was, like, a 100-point turn. Really. Took over an hour! But, I did it. With no spotter. Go me!!