What should I do while waiting for a kidney donor?

Kidney donor. You should continue to take good care of yourself. If the degree of renal failure is such that you are on dialysis, continue with your scheduled dialysis. Work on improving your health as much as possible (weight loss, exercise, etc), so that the surgery will go as well as possible.
Dialysis. If you need a donor kidney, it means your own kidneys are not working adequately. Your kidneys work to eliminate excess water, electrolytes, and toxins from your body. If you have kidney failure, you can opt for dialysis (hemodialysis or peritoneal dialysis) or a kidney transplant. Most will enjoy a better quality of life and longer life with a transplanted kidney.