1. "It's not your fault."

Because most of the time, it's not. Usually, when there is an issue, it's because the customer wasn't listening to the employee. It's important to listen and make sure you understand policies so that you don't end up blaming the employee for something that isn't, in fact, their fault. When this happens, the employee can feel personally attacked and thrown off.

If you're out shopping and witness rude customers blaming the employee for something out of their control, take a minute to shake your head and mention to the employee that you know it's not their fault.

2. "You deserve a raise."

Because chances are, they do. Customer service employees are usually paid minimum wage, which is grossly under what they deserve for the mental exhaustion their job causes them every single day. Sometimes, during the holidays, there are Christmas bonuses or time-and-a-half pay for working the holiday rush—but sometimes, there isn't.

3. "You are a great example of how every employee should be."

Because if you recognize their professionalism, you should tell them. It means a lot to realize someone took the time to notice what a great job you're doing. There are many different kinds of employees out there, so when you notice the good ones, tell them.

Just remember, if you don't have something nice to say, don't say anything at all.

4. "Go ahead and take a breather because I know it’s been busy for you."

Because it has been busy, and customer service is exhausting—emotionally and physically. It's emotionally exhausting because of the rude customers the employees are forced to deal with and it's physically exhausting because most of these jobs keep employees on their feet. Especially during the holidays, employees are constantly running around restocking and serving the inflated number of customers.

If you notice an employee taking a minute to grab a drink or catch their breath, let them. If they're taking a bathroom break or on a lunch break, don't bother them.

5. "You're so nice and helpful."

Because if you recognize their kindness, you should tell them.

6. "You make this place better."

Because if you recognize their worth, you should tell them.

7. "I understand how hard your job can be."

Because their job is hard. As I said, it's exhausting.

Christmastime adds stress to everyone involved. Everyone is rushing and fighting to get the best deals. But it doesn't have to be that way. Even if you have returns, exchanges or questions, approach it calmly and respectfully as the employee helps you. Don't make their job harder.

8. "Thank you."

A genuine, "thank you," really does go a long way.