I changed plugs on my 06 330i few weeks ago at 69k. Feels alot better. Also did a coolant flush hoping it would extend water pump and t-stat more. Also changed rear pads and rotors. Pads need replacing but I did rotors too cause I had an annoying squeezing sound that is gone now. Oh yeah and I changed a leaking oil filter housing gasket. Gunna have to replace valve cover gasket soon but I should be good for about 6-12 months. You could also do tranny fluid, check hoses and belts, lube hinges maybe and and sunroof track. Good luck. There's plenty little things you can do to maintain your ride.
2006 330i/ Monaco Blue/ ZSP/ ZPP/ I Drive/ Burl Walnut Trim/ Steptronic/ Xenon Adaptives/ Logic7/ CF Mirror Caps/ Matte Black Grills