I suppose I would have to go get a "real life."
No internet would put a damper on my writing as I do tons of online research while in the process of creating stories (dang, why didn't we have such reliable internet when I had to do research for school papers?) My Dubbing projects would defiantly cease...unless I did an occasional clip here and there with my husband just saved on my computer that only people that I'd see in person would see if they were interested in me showing them.
I'd have to get more stamps and envelopes to pay all the bills and go back to cutting down trees for my statements to make sure all the charges on the bank/cell/etc are legit...and keep a better record during the month to check statements since I wouldn't be able to do so as often as I do. Either more writing letters or more phone calls to compensate for the lack of email.
I grew up without internet and I am probably more social/productive now than I was back then. I'm sure I'd keep busy but no internet would still be a loss.