Your local hospital has paper work for living wills or advance directive.
Most advance directives contain a section about organ donation where you can express your wishes as to whether or not you want to donate your organs or tissues upon your death. But organ donors who do not have an advance directive also need a way to let their families and doctors know their wishes. Your family will ultimately decide whether or not to donate your organs. Being able to read your wishes about organ donation will make their decision-making much easier, but discussing your wishes with your family now is the best way to help them make this decision.
Please make sure you are registered, if you want to go on-line and do it here

This is not a flippant thing...as Kerri stated, people die all the time, to add to that; alot of them would have liked to donate, but never let anyone know.

AnneP.
A child enters your home and makes so much noise you can hardly stand it--then departs, leaving the house so quiet you think you'll go mad. -Dr. J.A. Holmes