A lady called today to say she still had my card from about 20 years ago. I couldn't remember her, the street or the job, but she my repairs were still good and she hasn't needed any roof work since. :) :)
She wanted to know if I'd clean her gutters, or knew anybody that could do it as good and cheaper. I gave her the name of a fellow I know that does those things.
She thanked me for the referral and thanked me again for my repair work. :) Sure made my day.