One tip I got early on from Grandpa was that when you back something up, turn yourself
And I never went far. I could swing that for 50', but I can't take it down the road like that.
Best tip I got on backing things up was when Grandpa told me to turn around, reach my hand out, and pretend i was picking up the tongue with my hand.
Then turn the wheel to move your arm.
I like that one, good grandpa
I had one that I used to teach myself
I worked at was member of a construction co-op,(profit sharing/loss sharing) holy train wreck and fun times
So we had all types of people trying to drive all types of vehicles...some guys were really good and skilled(humblebrag), and others were horrible to potato(one guy blew two six pack transmissions at once pulling a hydroseeder)
For those who wanted to attempt backing and wanted a tip I would say ...
-look back there at the rear of your trailer in mirror or over shoulder
-small movements only with the wheel and gas pedal
-imagine the trailer is pulling the truck
-make your truck follow in it's trailer's tracks
Probably confused the hell out of most of em...but the ones that got it thought it was a perfect tip...some guys jackknife and blame me
usually I would just do it for em(some of co op didn't even speak english)