How often do you put your services on sale?

How often do you put your services on sale?

I try to put a service on sale at least once a month or more often. Though, I don't want to give the impression that I have discount or cut-rate services. My regular customers seem happy with my prices, so I just offer an occasional sale.

How often do you put your services on sale? How much do you discount your services? And, does a discount actually help you earn more money?