There are a lot of different ways to deal with it, that is true and that's why I wanted to read all of the different ideas to see what other people find helpful ^_^
Though prooving itself as the most common one, and what helps me the most as well, is fluffy pets (or their vistual cuddles) :D I am not surprised there, pets are the best things to bring joy into a person's life :)
Keeping the body healthy is indeed a very important thing in order to keep the mind healthy, though sometimes the ugly depression monsters try to make us do the exact opposite :P So it's good to have something that you love doing which takes you out and make you do that!