Your post-retirement calendar should never be the same as your pre-retirement calendar. If others continue to wish that you were still available to do what you used to do, leave them wishing. It only means that you were successful in doing your job--but you don't have to take that with you through your old age.

Retirement is a form of resurrection. Let it be so. Be a new person, not the person you used to be.

And astound everyone with the new things you are able to do.