We can donate organs while still alive also, thus without harming the donor.
There are many examples of organ donation among family members.
The most common organ donated is the kidney.
Parts of other organs that a living donor can give are liver, lung, and on some cases pancreas and intestine.
Tissue donations include bone marrow and blood cells.
And also, there is blood donation that one can do regularly throughout his life.
So we don't have to leave this for after death, we can exercise this practice of generosity now already.
Are you donating your blood regularly?