I took it easy for the first 1200 miles, but did try to vary the rpms which I think is important. I used this method on my last BMW and got 10 years of faithful service out of that car. And I got the oil changed at 1200 miles too (and did techtron fuel injector cleaner at 600 and 1200 miles to boot). Car is running very nicely now and will take off in sport+ when I ask it too. I will change the oil / do techtron at 3k as well, then every 3-5k thereafter. Also only run 93 octane gas. And yes, I bought the car, if it was leased I would probably not bother with 1/2 of what i am doing.
2013 F30 335i 6MT M-Sport - Blk Saph. / Beige Lthr / Wood Tr. - Tech Pk - VSS M-Adp. Susp. M-Perf Stainless Exhaust M-Perf. brakes