In my opinion I'm not so sure folks will chime in on telling what was a time waster activity they did. I think the question could be more like this:
"Do others think you wasted your time on pointless activities today?"
Um, YES! I watched several episodes of the X-Files yesterday because I love that show, I surfed the internet and spent way too much time on this site because I love it, I spent time looking at my Magic collection working on deck archetypes.
ALL of which would be considered a time waster by many folks.