Self-Esteem/Attitude

Having good self esteem and a positive attitude are always important. They are most important in every aspect of life, your work-place, school-place and relationships. One time when I worked at Dairy Queen I had to deal with a rude customer, I was working the cash register and she came in screaming at me that her sandwich was not made right, but I had nothing to do with that, I did not make the sandwich, all I did was give it to her. But since I had a positive attitude, I nicely said okay ma'am could I get you a new sandwich? What would you like on it? If I would have had a bad attitude and screamed back at her then I probably would have lost my job. But instead I kept my cool and was polite, and in the end she left a happy customer.