Dear You're #1~
You are absolutely right, depression, like many things, responds to our ordinary everyday state. That is not say it is a cure-all, but it definitely helps if one does not have one or ore of those things dragging you down as well.
I think your use of the words 'more manageable' are well chosen. Although one has to rely on many forms of support, medical and personal, gaining experience in managing the illness is really necessary. It always helps me to know I've been through it before, and come out the other side. That is, for me, a form of managing, as is avoiding triggers.