I'm 29 and struggle with attention, procrastination, brain fog, and depression. I have since I was 12. It's only lately that I'm realizing that it's almost certainly connected to my usage of internet forums/stimulation (SA, 4chan, Gamefaqs, stumbleupon, etc.) which started right around that same time.

There's something wrong with me and there really are no other explanations than my compulsive internet usage.