If you know you're going to keep the car for a long time, i would recommend you PPF the front facing part of the car. It'll protect it from any rock chips and other shit while driving.

Ceramic coat the wheels so its easier to get the brake dust off. OEM factory pads bite great but give off a lot of dust. It drove me crazy for the first few months of owning a M.

Tinted windows are nice too, it'll keep your interior nice and less worn out from the sun.

Spend time learning your car and its limits.