I would have finished Stephen King's Dark Tower series by now, that's for sure! (nearly there though, no spoilers)
I seriously resisted having a smart phone for years. I knew I'd become addicted to it so I just never got one. About two and a half years ago my ex girlfriend (psycho hose-beast) took a contract out for me and got me one (despite me saying for months that I didn't want one). I think she was embarrassed by the fact I had an ancient phone that could literally just text and call. I was happy in my ignorance though, I checked Facebook like once or twice a week and still used to go on forums, just on my laptop so not as much. Admittedly I wouldn't have got so stuck into DTF without my smart phone but I often think I should be spending my time more productively.
I know I should have some control over myself but it's just so easy and I know what I am like. The easiest way to avoid something that I deem not good for me? Just remove the temptation, easy! I am seriously considering going back to a crappy old phone. I'd get through a lot more books, just like the rest of you, and spend more time being creative/drawing.
I know I'm going on about my smart phone here and not necessarily about the internet as a whole but you get what I mean. I'd be doing more of the things I did before getting my smart phone as I didn't use the internet that much before that. I guess me and my buddies would play computer games at each others houses more and I would have discovered WAY less music, so it's swings and roundabouts really.