At work we have a customer comment form called a Spark Award. If customers are happy with their 'experience' they can fill out a form that says lots of nice stuff about the teller who served them. I have been with the bank for just under three months now and I have already received two of these (apparently it's quite rare to get them as most customers are happy to complain but don't make the effort often to congratulate someone on a job well done). The bank then gives us a scratchy ticket (lotto thingy) as a reward.
I think the next time the witch who complained about me comes in, I'm going to shove my Spark awards up her arse.