I'm going to be perfectly honest about something. While at work, I occasionally get incredibly distracted. This is going to sound like a lie, but if I didn't, my work would suffer. Those zone out periods and times of sheer glee allow me to get back to the drudgery of the daily grind.
Many things really get me, from limitless research of fantasy sports, to the occasional massive Bill Simmons mailbag, to my comic book thread, all the way to even the Vin Diesel random fact generator occasionally.
One of the sites that really gets to me is someecards.com. This site is hilarious and has an ecard for any situation, regardless of how ridiculous it is. Having a hard time at work lately? See the card at the top. Have a friend who may have a gay boyfriend? Send her this. Wanting to send me a note of congratulations about running the Portland marathon? Send me this.
Amy is the first person who showed me this site, and it's been very good at wasting far too much of 
my time ever since. It's really fun just to waste time sending emails back and forth with friends with these attached. I mean come on, who hasn't wanted to send this one to another coworker suffering from a bad case of the mondays?
If you haven't went to this site before, I recommend it. Especially at work, because nothing cures a case of the mondays like basking in the hilarity of this site.