Three spring to mind:
- "You just lean to go around corners"
That one's been around for how long?
- "Motorcycles: nasty, horrible, dirty, dangerous things"

- "The faster you go, the longer it takes to stop"
My first 'lesson' in advanced riding, the day I bought my 400four. Spent years ignoring those good words . . .
As for lifesavers/shoulder checks at higher speeds, a friend of mine put it quite succinctly:
"If you know what's there you don't need to look."
FJS's 'mirror history' has it's limitations 'though, and it's important to acknowledge them.
Standing on the footrests? Probably depends a lot on the bike as to whether it's even possible: can you comfortably ride a 'Blade or R1 while stood on the 'rests?
Learning from experience? Well I learned tailgating from the motorway rush-hour people, they do it every day and live to tell the 'tale', so it must be right!

I'd use counter-leaning instead.
Training info is (C) Malcolm Palmer. He asserts his right to be identified as author under the Copyright Design Patents Act 1988 & may be quoted only as part of a post in the Visordown bb by another board member. Author should be contacted for written permission before any other use, storage, transmission or recording, by any means.
Read my mutterings:
http://the-ride-info.blogspot.com/