I'm a little bit concerned about the "Don’t be scared of the ditch" advice. Unless the terrain is consistently flat and visibility is very good, my advice would be to avoid the ditch at all costs. Ditching can involve loss of control, multiple roll-overs, hitting solid objects (boulders, trees, etc.), mowing down pedestrians, etc.
I would add number 6: Be extraordinary careful when getting out of your vehicle after an incident. A slippery and/or foggy highway is no place for someone without a metal frame around them.