1. Not having the hot water turned on in the customer restrooms.
2. Actually saying, "I probably didn't tell you last time that I am bad at calling people back to let them know that their order is ready."
3. Actually saying to a customer when referring to their delivery process of the $1,000 product just sold, "I have no idea when those pictures will be up on the site. I have no idea if they (a 3rd party vendor) will send the same size postcards as we have envelopes. I have no idea if they will send the orders at the same time."
Customer service non-blunders...
1. Have it turned on.
2. Get better at calling your customers back.
3. FIND OUT!
Being service-minded is not just a touchy-feely added bonus. It is caring for the customer, caring for the customer, caring for the customer.