Exactly what type of training does a mountain rating entail, I would have thought most of the points would have been covered in your PPL, i.e.
Don't fly up a box canyon.
Don't piss about on the downwind side of a ridgeline when it's windy.
Don't assume you can scud run under the fog thru hills and canyons
Always have an exit
Lean for density altitude on take off.
Always fly the numbers and know your aircrafts performance specs at altitude.
Take a warm jacket, a tammy, a fully charged phone and an extra pack of smokes in case you get stranded.
And most importantly when waiting for rescue, don't eat the yellow snow.
Have I missed anything ?