I think communication skills are key. This means showing employees how to listen well, understand others' feelings, and answer customer worries well. They often use role-play exercises for staff to practice these skills in a safe place, getting them ready for actual situations.

I think most companies need to work on having a good attitude about complaints. They teach their staff to see complaints not as negative feedback, but as chances to get better and make customer relationships stronger. Changing this viewpoint is important for focusing on customers and making sure employees deal with complaints in a helpful and positive way.