Very mundane and, simple but, being a manic depressant since the teen years I have tried and experimented and tested many differing methods of coping. The prescription anti-depressants didn't do too much and the marijuana, whilst most certainly numbing or, diminishing the condition, does not provide for any true relief. And of course the side affects of all of those are real and sometimes detrimental in their own other ways.
I have found another source of relief some years ago - if one is not preoccupied with other matters such as work or schooling - and that is cleaning. When a little down and not feeling like really doing anything, it takes a little self arse- kicking to motivate oneself but, after you knuckle down and get stuck in, the symptoms diminish somewhat. I think it also has to do with the little saying, "cleanliness is next to Godliness", which is so true and I believe that when God sees you are trying to do something about it, He also then provides further relief. Even if your home and all is spic and span, try finding something that needs cleaning and after doing it, reassess your condition which, I can almost guarantee, will have alleviated quite some.