one of the best things would be to get rid of the crappy low buck 91-92 lights, get some elpisoids from a 89-90 93-95 car or euro lights, all direct bolt on's, effective and not some gay wigger stuff, euro's would be best as you can dial whatever wattage you need with bulbs but the elipsoids are not too bad and have a same sharp beam cut off as the euros that lets you properly aim the lights down the road without blinding people, the 10 watt better high beam to low beam bulb trick helps too (9005-9006 or 9006-9005 i can't remember), it's covered on bmwe34.net, i've seen some complain about bulb life with that mod but mine lasted the 2+ years i had my car before i sold it