J.S.
I've been in your shoes! I love the book Depression Fallout. Very realistic picture of the challenges that those who love someone with depression face. During my husband's worst bouts, I had my own counselor to whom I could vent my frustrations. Just knowing that I was going to get an hour all to myself every two weeks was enough to keep all of those thoughts that were going to explode out of my skull under control. Journal if writing makes you feel good. One of the biggest resources has been that the psychopharmacologist (meds doctor) who he has been seeing for the past year invites me to all of the appointments and lets me contact him directly (which required my husband's permission, of course). It's good to know that if I think he's off his meds or that something isn't working, etc. I can call him and he'll be proactive about reaching out to my husband to get him into the office before the wheels totally fall off the cart. It's also empowering for me to be right there at the table and feeling like I'm part of the solution and not some frustrated bystander yelling through soundproof glass while he sits there and lies to the doc through his teeth and the doc treats based on totally delusional information, which has happened in the past.
I love FlyLady.net. It's not related to depression per se, but it's a great resource for how to organize yourself and your life so that when you are faced with "doing it all" you feel empowered to do what needs to be done and not totally overwhelmed. The site's founder had depression herself and a lot of people who are members (it's free) have also experienced it as a patient or caregiver. The site sends out a lot of e-mails (if you want them) with testimonials from members on this or that trick that worked, etc. and they are all very positive and upbeat and encouraging. Lots of times I delete them without reading because they clog up my in-box but when I feel like I'm sliding into a frustration and despair rut, I'll start to read the e-mails and it helps me to feel better and get moving forward.
Good luck to you - it's a long road, and I hope your husband starts to get back to his old self (or his better self) soon.