I can easily go a bit tab mad. And noticed this in myself ages ago. At work I vowed not to look at sites that weren't work related. And instead checked personal email/sites before or after work. I was more organised. I even used to sit on the train and plan my days work. And it paid off.
These days I'm more and more distracted, have issues concentrating, and I don't have a smartphone, which I'd probably gravitate towards. It is in part, why I don't own one.
I also have congnitive difficulty reading from the screen, so if I stumble across something I think is worth reading, I send it to my e-reader. There I have a ton of unread articles. But I do tend to do one at a time, and it sticks better.
The young ones seem to be able to happily multitask, they sit next to each other on the bus or in cafes talking and surfing simultaneously. I find multi-tasking increasingly difficult, they don't, what gives?