I've read this article by a BBC reporter about not using the internet for 3 days. Really makes you think how much we rely on it these days.
I must admit I can go without. In fact I did while we were away on holiday, except for a couple of days when I used my mobile phone to connect my lappy to the internet – for which Orange charged me an arm and a leg!
But, at home we do tend to rely on it. We check how much is in the bank, do the shopping etc. etc. It's amazing how far things have come in a relatively short space of time. In fact I only bought my first PC in 1999!