For a while in undergrad--and who am I kidding, most of law school--my in-class internet distraction of choice was online Tetris. My brother had the same affliction but he was a lot better at the game: his hand would hum over the arrow keys like Data piloting the Enterprise.
It got pretty bad. I had to get a Firefox add-on called LeechBlock to prevent me from accessing certain sites (see also: Websudoku, if you dare!)--and then a whole other program called Website Block to prevent me from switching to Internet Explorer to thwart the Firefox add-on. That I had installed myself. To make me more productive.1
My Tetris-playing ended one night when I closed my eyes and found myself seeing irregular bricks raining down behind my eyelids. I imagined them piling up at the bottom of my vision. Frantically arranging falling blocks is no replacement for counting sheep.
All this to say that yesterday I spent all day, from 9:00 a.m. (at which point the dog is up, so I am up) until midnight, reading notes on Immigration Law, and cross-referencing them with the appropriate provisions of the Immigration and Refugee Protection Act and accompanying Regulations. And last night I dreamed in numbered paragraphs and sub-paragraphs.
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1 Unrelated: Clearly I am not one of the majority of people who doesn't know what a browser is. I have a lot invested in the browser war. I've now switched to Chrome because I have a small laptop monitor and the Chrome browser takes up the least screen real estate--and not a little because it doesn't have LeechBlock on it.