Be thankful for the help you can give to others.
Is there a more certain way of knowing that you’re still relevant? That you haven’t lost your touch? If people genuinely seek you for advice or assistance, what a compliment they pay you!
As an additional corollary, be eager to give what’s requested. Part of why you’re asked is because people believe they’ll be treated with respect for asking. That doesn’t mean you always have to say yes, but it does mean you’ll never treat a request as an annoyance.
If you haven’t been asked for help in a while, your life may be askew. Be glad, therefore, when you are!
The Opportunity Machine 