What accessories you feel a car must have and what are the optionals?

Tweet

In any case, what do you have? Accessories could be functional or plainly decorative. I really like body kits and modifications but I would only buy them for my car if I had a lot of extra money. The must-haves are pretty basic for me, such as a radio and a GPS. My radio broke so I really appreciate its usefulness right now! Oh, and I also have decorative furry dice hanging from my rear-view mirror! Hahaha! :) How about you?