The best way to deal with feeling melancholy, I have found - is to embrace it wholeheartedly. And then let it go.
Music helps me get to where I need to go with sadness. If there is a sadder piece of music out there than this one, please let me know. In the meantime, enjoy?
This video is also a good writing prompt. Something about the changing colours and the woeful tune conjures up creativity. Well, for me, anyway.