I'd lose my phone in an instant. I barely use it. The obvious answer would be internet but I like myself more when I don't have internet. I don't go for the instant gratification of online life and I start doing more interesting things with my life.
GlassDog, yes a person could cut that loose and have more time to spare...I'd hate to not be able to find things that I need without driving all over though. Maybe a quick trip to the library to research things a couple time a week.
Cell phone.. a good cell can access the Internet and most cable shows and it travels with you ... Internet can make calls but won't follow you from point to point....
Phone and cell phone. I would get more accomplished. I would have the internet taken off my cell phone as well. The internet is so seductive and addictive.