Day Fifteen: Something you couldn't live without, because you've tried
Sounds lame, but the Internet. I hate not having immediate access to people, news, information, etc. With the Internet, you can lack cable, stereo or a phone if you have to, but still be able to watch TV and movies, listen to music and communicate with others. I'm able to make international calls for free. I can prove the Captain wrong at any time by looking up proof to my side of a debate. (That's pretty important, right?)
Day Sixteen: Something you can live without
While I prefer not to, I can live without cable. I can access shows online (as I already mentioned) and can pretty much keep up with any series I want to that way. I don't like to do it that way, but if I had to, I could do it.