My car. I can't stand having to depend on others to give me rides, and I don't have time to ride a bike between my daily obligations (which are usually lined up one after another for 15 hours straight and 5 minutes grace-period between)
I literally wouldn't be able to have a job or go to college without my car
My galaxy s2 is pretty high up there, I feel naked without my phone.
Then again, my truck is so convenient. You really don't realize the freedom you get from driving until you can drive.