Since you asked:
Immediately, as in, first time you have the car turned over, you want to keep the load on the car high. You want to be at as much full throttle as possible. Don't purposely get close to redline, but much more importantly, don't lug the motor either (put on too much load at too low of an PRM). You should be constantly pulling from 2500 to 4K RPM then decelerating, and going back at it again. The purpose here is fill the combustion chambers with as much pressure as possible, which will put outward pressure on the piston rings which will help them to create the best possible seal against the cylinder walls.
You want to try to keep this constant load up for as long as possible, for the first 100 miles if you can. After those 100 miles, you're done with the high-load pulls, now you want to slowly start working your way up the RPM range at light load. Let the revs get as high as 5K RPM for the next 50 miles, then 5500 for the following 50 miles, 6K for the final 50 miles, and then you're done. Now you can drive her any which way from Sunday.
This technique has been used by some (many?) race teams for decades, and is published in a number of technical papers. No manufacturer can recommend this procedure to you because of the legal liability therein, but this is a generally agreed upon method for properly cylinder sealing which creates more power, better fuel mileage, and reduces oil consumption. When companies talk about "breaking your engine in on a dyno", they are using the dyno to create an artificial load that allows them to keep the motor under high load for longer periods of time.
Here are some resources to read on the topic.
http://www.mototuneusa.com/break_in_secrets.htm
http://www.ntnoa.org/enginebreakin.htm
I have some other documentation if you're interested. Just let me know.