Clicking the wrong Wikipedia link can cause me to lose hours of my life, but never tvtropes. I feel like I'm missing some enthralling way to use the site. Maybe that's for the best.
> That's an amazing site, but I'm going to have to go to sleep now.
"Yeah it's fascinating isn't it.
> Night.
"Have you looked up 'Videodrome'?"
...
> You bastard.
And it is next to impossible to be original as a writer. Everything has already been done at some point in the past 5000 years of recorded history.
My hypothesis is understanding the social fabric we live in is of the utmost importance, so maybe spending a day (or more, personally I spent weeks on tvtropes!) means that we unconsciously realize that, since it's more important than immediate productivity.
To say that differently, since we live a social life and interact with others, I think the long-term gains that come with a better understanding of the "common mental picture" allowing more fruitful interactions may be way more important than writing a few more lines of code.