How do you take care of yourself physically, mentally, etc?

I am getting over strep throat and a cold probably due from being in hospital with Mom for 6 days. I know I have gained weight, don't exercise, have trouble relaxing (I can't sit still any more, even just to watch TV). I need to find a way to balance work, family, Mom's care, etc. What do ya'll do to keep yourself physically and mentally fit to take on the challenges we are facing taking care of our loved ones?