I know some people have a rule with new engines where they only go upto certain RPMs for so many miles at a time to help break in the new engine.
For example......
2000k RPMs for a couple hundred miles, then say 3000k RPMs for a couple hundred so on and so forth. The basic principle is you wanna take it slow in the beginning, you dont wanna go right out to the track and burn the tar out of it and potentially ruining your investment.
Obviously you are gonna rev higher RPMs at certain times, ie getting on the highway from a merge lane, or speeding around the old hag in the speed lane who is only going 45mphBut you wanna baby it for a good little while.