Personally i think the most important things are:
Wait until it's fully up to temperature before giving it any sort of load or revs and by that i dont just mean when the water temp is in the middle, wait a bit longer to give the oil a chance to warm through.
Dont labour the car in a high gear up hill etc, better to use a lower gear and use the revs dont worry about setting an artificial rev limit this wont do anything to aid running in, if anything it may hinder it.
Try to use engine braking as this helps to draw a vacumn in the cylinders which encourages oil to be drawn off the bores along with any metal particals.
It wont do the engine any harm to give it the occasional blast through the gears, even if this results in brief use of full throttle, you need this to get the rings to bed in properly which is the most important part of a new engine. The bearings, journals and everything else for that matter are made to such accurate tolerances now you dont need to worry about bedding them in, 20 years ago maybe when you could have high spots etc due to pi$$ poor machining and quality control. I just drove mine normally from the day i picked it up, i didnt rag the ar$e off it but i didnt give a second thought to letting it rev to 5 or 6k
Basically just drive the thing, use what ever amount of throttle feels right for what your doing, use what ever revs you like, ok dont bounch it off the rev limiter but dont drive it like there's a block of wood under the throttle either.
