Is it appropriate to do something special for someone who finally finished their cancer treatment?

The person went through chemo and radiation, then surgery, and now chemo again, but this chemo is much more intense and traumatic to his body. The doctors believe the cancer was all caught with the surgery, so I guess this chemo is for good measure.

I feel inclined to do something to honor the process being over after his last treatment, he has had such a rough time of it these last two months.

If you are willing to reveal it, let me know if you are a cancer survivor yourself, and what made you feel better during the treatment and when it was finally over from friends and family.