The two major "modern" things that I've avoided are cellphones (let alone smartphones) and Facebook.

With regards to the former, I have a landline at home and generally use Skype for communication otherwise.

With regards to the latter, I must admit that I'm really put off by the idea that your personal information is evidently being exploited and shared.

He's faster than a bullet, stronger than a train
He's the one who got lucky, got his cape around miss Lois Lane
I can't believe my dilemma is real
I'm competing with the Man of Steel

- "Jimmy Olsen's Blues" by the Spin Doctors