Hey Mark,
Just wanted to say...what an interesting chap you are! Ever been through Hong Kong? That's great, what you did for the Cambodian children, wonderful.
So...yeah, I think you should read Dragon a few books, if you have the time , apparently it works much better, and progressively better, the more you can read to it.
Couple of recipes for keeping depression at bay: a) watch Fred Astaire and Ginger Rogers movies and b) put on music you really like *full blast*, so what about the neighbours, and chair dance to it - you know, jigging about in your chair, I do it all the time - specially to Motown, oh yeah baby..
And lastly, weather permitting, try to catch a sunrise or sunset; it resets a lot of things, like your timeclock if you have jetlag ( it works!) but also regrounds your whole system. It's free, beautiful and effective more often than not.
Love ya, all the best!