Am I wasting my time?

Had a very tiring day at office! Sitting in front of tv - watching different movies across channels. Watched a part of Hancock, now watching Shootout at Lokhandwala...
Though I am extremly exhausted and in no state to do anything better - why does the guilt feeling of wasting time come to my mind when I am only watching TV?
I feel I should atleast have my laptop on - not that I do something very productive - just checking mail,FB...
But that somehow convinces me partially that I am not completely whiling my time -but as i said - only partially. Somewhere in my mind the thought always finds its place - that after office hours and cooking dinner I should also give some time to do somethings beyond that - maybe sometime for reading a book, or do some painting or something other than the routine stuff.
So here I am - writing a post to my dear blog after ages :) - feels good!!! Surprisingly this seems to have brought down my exhaustion level a bit as well :)