When I'm feeling sad or depressed, I always go and do something to try and cheer myself up. 
A lot of the time I find that music works best.   With the right song it's like I can escape the hard reality that be... even if it's only for that short while.

One of my favourite songs of all time is Joe Cocker's version of With a Little Help From my Friends, and especially John Beluchi's take on Joe Cocker's version of.... yeah you get it.