It says in the manual to keep the revs below 4500 and vary your speed...(no cruise control).
I took the approach to only put a light load on the engine for the first 500 miles or so. After that....would run it up to 4500 (maybe a hair more) and some low boost (5lbs max) until I got to 1000 miles.
I've got over 2000 miles on it now, and have still been taking it easy for the most part. Few redline runs, and a few 10lb + boost pulls.
Think common sense is the best method. Made sense to me at least. Maybe I am too easy on it, but just tried to be progressive with it and give it more load and rpm as the mileage increased.