Safest thing is to not let yourself get to the point where you don't feel like doing anything. When you feel like this get up and start doing something really fun!
A pause from Depression to share wisdom from the journals of some good thinker:
Today is: 23rd August (GMT), in history on the 23rd of August, 1907 AD the following event happened:
Pitts Howie Camnitz no-hits New York Giants, 1-0 in 5 inning game