Hi bp101,
Sorry I must have missed this thread in the rush of early posts otherwise I would have replied earlier.
I've got bipolar 1 and mostly my issue also has been coping with crippling depression, sometimes literally too as I have chronic sciatica which makes it hard to walk (and I now know is directly linked to when I am struggling emotionally). So I know what you mean about how terribly debilitating it can be.
Years ago a fellow sufferer shared a strategy with me which seemed rather harsh at the time, but it has helped me a lot over the years. He said "every single day you do what you need to, and then what you can". Some days even doing what you need to can be excruciating: feed self (& kids if you have them), shower, shop or pay bills so you have food/utilities/roof over your head. Those days try to acknowledge every little thing you achieve, not comparing yourself to how hard or easy it is for others, but just to see your own achievements. However "small" these tasks are they take courage to achieve because depression is like wearing a millstone. When you are having a slightly better day do what you can and celebrate that too.
I saw a suggestion one of the others made elsewhere on the forum which I think is helpful too, each day find space to do something which you enjoy or is special even if it is small. This in itself can be quite hard work too, as depression tends to sap one's sense of enjoyment, but all the more reason to practice it.
I think the biggest thing that has made a difference to me is having more compassion for myself. For so long I didn't understand WHY I suffered from depression so constantly, and I felt like there was something wrong with me as there was "no reason" for it. It's been a long lesson for me - I've found there are always reasons for these things, we just may not hold all the pieces of the picture to make sense of it yet.
When things are hard or painful, rather than telling yourself to get on with it and stop whingeing (or whatever version you use to beat yourself up with, that was one of mine), try acknowledging the pain and difficulty and then encourage yourself as you would a good friend who is going through a terrible time and needs all the support they can get.
I hope this helps answer your question somewhat, it's a big one.
Best regards,
Kristin