Advance directive (AD) forms are available at hospitals and medical offices and online. AD laws differ from state to state. Make AD a part of your permanent medical record by giving a copy to your doctor, though it will come into effect only if you are unable to make your health care decisions. Keeping a card giving name of the agent, and location of your AD in your wallet or purse, periodically updating it, telling your chosen agent and others about its location are other measures you can take.
Resources: Organizations such as Aging with Dignity, Caring Connections, Funeral Consumers Alliance, U.S. Living Will Registry, and Amercian Bar Association help with AD and means to plan afterlife, deal with dying, and post death issues, hospices etc.