Adjusting my goals to fit my level of functioning, has brought me some contentment. I used to always feel guilty over not reaching some goal that was to ambitious for me. I used to feel guilt and shame about not managing to reach my too-high ambitions, and I also felt ashamed that I could not live up to other peoples expectations of me. Contentment has a lot to do with accepting myself and accepting my illness, and to not compare myself to others.
Not having constant stress over all the things I felt I should do, has opened up a space in my life where I can allow myself to feel contentment. On a good day that is... Contentment is enough for me, since it is healthy and it makes me more stable. I think that contentment is the same as happpiness.