prprinciples.com

You never know where the next PR Principle will come from.   

 I was on my bike today coming up a long fairly steep grade.

PR Shot

There are only twelve speeds on my bike so it wasn’t long till
I found myself tacking from one side of the road to the other.
Tacking is a nautical term for sailing into the wind on an angle
to take advantage of the side swipe of wind. 
  In my case it wasn’t wind I was taking advantage of , it was gravity.
As I crossed the road I would dip ever so slightly back down hill.
This would give me enough momentum, and a slight rest from the strain
to head up the hill as I turned to continue tacking down a little
and back up the other side. 
With this method you can coast up  
some of the toughest of hills as long as you keep a close eye on the traffic.
The PR  Principle here is… to let the other guy do what he wants to do.
If you can help him rest or coast while he makes his decision, he will follow
 you to the top.
Good and right decisions are made only  when your client is rested
and in the drivers seat.