Facebook amnesia
When you get on the computer to do something important, but you instantly go to Facebook like it's your second brain and forget everything else you were supposed to do.
You opened the computer to finish your homework, but now you're arguing with a random stranger on Facebook.
You were going to send an email to your boss, but now you're watching a video of a dancing cat.
You started to write a letter to your mom, but now you’re commenting on a post about why pineapple belongs on pizza.