Keeping up with fitness to the degree possible is a big boon to my mood and general feeling of well-being.
I have found for myself that limitations have made me much more mindful of how I am exercising and I am finding that interval training is REALLY important. My nerves end up getting tweaked if I do any one thing for too long. What didn't use to be repetitive strain is now. So that may mean I only do ten minutes on the stationary bike then 10 on the elliptical. On days when I feel tired I will do a lazy swim.
I have ended up with more variety then I use to have. When my foot is really fussy I can still kayak or do sitting and prone yoga positions. Before this, I had never tried yoga at all. I have also gotten creative about modifying exercises or positions so I can safely do them.
And diet...well except for the cupcakes it is pretty clean.

Hey, I can't be good all the time!