After I hook up the camper to my truck I like to have someone else look over the hitch. Sometimes it is better if they don't really know what they are looking at - as they question everything. Either way, nice to have someone else check.
When I pull about halfway down my driveway I check the brake override on my brake controller. Just go really slowly, slide the brake override bar (or button depending on your setup), and the trailer brakes should activate. Also, at this time I'll stop and get out to check the hitch one last time.
Similar to everyone else, I have sort of a checklist in mind when hooking up and unhooking. Important to not get distracted in the middle of it. If something does come up (kids see animals in the woods, wife opens fridge and everything spills out, etc), try to finish the particular job you were doing before going to investigate.
When our kids were young, we had a "rule" of no electronics. Bring games, lots of books and magazines, drawing supplies... sidewalk chalk is always fun. As our kids got older we dropped the "no electronics" rule -- but they were so used to it, they kept it anyways!
We did use electronics, especially portable DVD players, in the truck on long trips. They were sanity savers on long trips!