If going to the gym doesn't fit your schedule, consider doing a free online fitness workout. There are many to choose from, and they can be done when you have the time.
If you aren't able to make financial contributions to a non-profit organization or a cause you care about, consider volunteering your time. Many charitable organizations need more volunteers, and this is an excellent way to provide hands-on support.
Novelists Frank McCourt (Angela's Ashes), Daniel Defoe (Robinson Crusoe), Alex Haley (Roots), and Bram Stoker (Dracula) all published their most famous works after they were 50.
For most people, planning funerals in advance is very satisfying because they've taken care of an important future event and eliminated a lot of stress for their families.
Set up an email account that you use only for online verifications. This will help protect your primary email account from spam and junk mail, as well as potential hacking.
When the weather's nice, get back on a bicycle. It's easy on the joints and provides a good cardio workout in the beautiful outdoors. Start out slow if it's been a while, but aim for riding an hour a day.
Cherish your life experiences. Older adults remember a time before constant connection, when children played in the neighborhood until dark, and life was far less hectic than it is for younger people today. Preserve those memories by writing them down.
List each of your debts, how much you owe, and the current interest rate. With the completed list, create a 12-month payment plan to pay off or drastically reduce your total debt.
Take a photo with your phone that shows exactly where you parked at a mall (or a concert, the airport, etc.). Then you'll know exactly where your car is several hours (or days) later.