Several sites offer planning tools that, at the very least, get you thinking about what you would want if you should become terminally ill or die. The forms let you specify any arrangements you have made and with whom, and which of your organs, if any, you wish to donate. For a processing fee, you can make a donation in the name of a loved one. State laws on cemeteries and funerals are included, as is a complaint form you can download if you've had a bad experience during an already difficult time. Because scam artists tend to prey on folks in their vulnerable and fragile moments, you can at least educate yourself.
Several sites exist as tribute to pet devotion.
Maybe climbing the family tree piques your interest. The grimly named Social Security Death Index has information through the end of April 2000 and contains more than 63.5 million records.