You have a lot on your plate.

I second nevergiveup's idea about trying to solve the smaller problems quickly while you engage the more important difficult issues on your docket.

Also, have you ever looked into integrative psychiatry? naturopaths? nutritionists? cutting back/eliminating things that are really bad for people with mood disorders (like sugar)?

And I have the following anecdote, which gives me hope here in the meantime as a sufferer of chronic severe depression:

In a business book by James C. Collins called Good to Great, Collins writes about a conversation he had with Stockdale regarding his coping strategy during his period in the Vietnamese POW camp.
"I never lost faith in the end of the story, I never doubted not only that I would get out, but also that I would prevail in the end and turn the experience into the defining event of my life, which, in retrospect, I would not trade."

When Collins asked who didn't make it out of Vietnam, Stockdale replied:
"Oh, that's easy, the optimists. Oh, they were the ones who said, 'We're going to be out by Christmas.' And eventually they died of a broken heart.

Stockdale then added:
"This is a very important lesson. You must never confuse faith that you will prevail in the end—which you can never afford to lose—with the discipline to confront the most brutal facts of your current reality, whatever they might be."