Bro I got a new 1er in the summer after graduating college.
Get a suspension upgrade. Do some DIY cheap mods like black grills or debadge for a cleaner look.
Low and clean like the other poster mention gets bitches. And bitches are the best.
But don't slam it like a mkIV GTI. Glad I didn't go that route with mine.
2012 BMW 128i 6MT Deep Sea Blue Metallic
FX-R Bi-Xenon Projectors With 5000k Bulbs & Halo's More Kick Ass Than Any BMW