"...my mind was still sharp and my energy was good...My schedule had too many blank spots. I was liberated. I was free. But I was joyless."

Another way to get back some joy would be to share yourself along with your money. Many people here aren't really interested in your money (well, some of us anyway), but I bet almost everyone is interested in you. How did you do it? What do you believe? What advice would you give? Probably most of all, what do you do to stay sharp at 81? Inquiring hackers want to know.