I didn't do anything special. Kind of babied it for the first couple of weeks, but other than that and no heavy towing under 1K miles, I don't think there is a real need for break-in.
My last vehicles got nearly no break-in. I bought a ;98 Mustang V6, and a week later took a job that had me commuting 45 miles each way on the Interstate. The next one was an '03 Sport Trac, and a couple hundred miles in we had to drive 1200 miles for a funeral -- in a group of cars doing 80+ the whole way there and back. Neither of those showed any ill effects.
You'll hear a dozen different philosophies, from hundreds of different people. I don't recall ever hearing of someone finding a break-in strategy that did not work out well. Thus I would conclude that engine break-in is (within reason) not an issue.