I LOVE my Tundra but even though I have the towing mirrors, I have quite a large blind spot so put a couple of those small, round fish-eye mirrors to help with that.
I'm (Rick) the driver so my navigator (Karen) will get out and stand on the side that I cannot see (because the trailer is turning) and we'll call each other on our cell phones and I'll have it on the speaker in the truck while she guides me and ensures I don't hit anything! (I tried to teach her the standard hand signals we used in the military but she is more of a verbal person...she'd never make it on an aircraft carrier!!) :-)
Practice practice....it takes lots so you know where to actually start the turn and it varies based on how much of an angle you need and whether it's on the right or left side. (I always get out of the truck to line myself up because I know where my back truck wheels need to be...after much trial and error!!)
Get a couple of orange cones and go to an empty parking lot and practice backing up...then try to get rent pull-throughs at RV parks!!!