I tend to do that too...
Say I have to write a paper on the principles of electricity. I pull up WikiPedia and search for "Electricity"...
Well, near the bottom of every page, it suggests you look up stuff like, "Hydro-Electricity" or "Thomas Edison" or "Nikola Tesla"... maybe it's relevant!
So I click Nikola Tesla (Who, by the way, was the most brilliant man aside from Einstein)... and that leads me to a webpage where it mentions the Tesla Coil. So I go to the Tesla Coil.
And then there is a link to the Philadelphia Experiment... that sounds interesting!
And from there, I get dragged into a link about US Conspiracies, whoo!
So I Google the conspiracies.
I get another WikiPedia page... about the moon landing, and Roswell...
And I start reading.
And I read some more.
And then I go search for the JFK assasination.
And over time, I realize that I'm not working on my paper.
EDIT: I had Alfredo and grilled Chicken for dinner