Although the following excerpt from www.mercola.com came from an article arguing against the use of psychiatric medications (of which I am unsure where I stand- I think there is a need for them in some instances), this particular excerpt is just good advice for anyone going through a rough patch in their life.
Key Factors to Overcoming Depression
Exercise – If you have depression, or even if you just feel down from time to time, exercise is a MUST. The research is overwhelmingly positive in this area, with studies confirming that physical exercise is at least as good as antidepressants for helping people who are depressed. One of the primary ways it does this is by increasing the level of endorphins, the “feel good” hormones, in your brain.
Address your stress