Finding the right product and marketing mix may feel like the biggest business challenges facing your retail shop, but the best-planned strategies won’t get you far unless your business provides good customer service.

All it takes is one sour interaction for a customer to turn around and not come back, or worse yet, spread bad word of mouth about your business to other potential customers.

On the flip side, good customer service can generate sales increases when more traditional methods like inventory levels, promotional activity and store renovations have stalled. High-quality service can lay the groundwork for a long-term relationship with your customers, making them repeat buyers instead of one-time shoppers.

Following are key guidelines to keep in mind when evaluating and improving customer service in your shop:

Make sure you have enough staff to serve customers

One of the first rules of good customer service is ensuring you have enough staff on the floor to help customers fill their needs. Even the best-trained, most enthusiastic employee cannot keep customers happy if they are kept waiting for service too long. As the ratio of customers to staff increases, service availability declines, and vice versa.

Business owners should be knowledgeable about peak times for customers – whether during the day or during the year – and staff accordingly. For example, a donut shop catering to morning commuters must staff enough employees during the early part of the day to avoid long lines and frustrating waits for customers. Similarly, a pool supply store would need to hire more employees during the summer to accommodate increased seasonal demand.

Such advice may sound obvious, but it can be surprising how many business owners try to save on hiring expenses, only to have their service suffer when they need it to be at its highest levels. Efficient, quality service can increase sales during the store’s highest volume selling periods.

Invest in good training for your employees

The quality of your store’s customer service often relies on part-time employees who rarely feel as invested in your business’ success as you do. And while taking care of your customers may feel like second nature for you, even the brightest employees don’t come automatically trained to provide good retail service. By training staff how to help customers have a good experience in your store, individual customer transactions will not only become more pleasant – they also can become more profitable.

To give good customer service, everyone must remember that customers are in your store because they need or want something, and it is the employee’s job to help the customer fill that need efficiently and pleasantly. Thorough training for your employees will give them the guidelines they need for a baseline level of good service, as well as the latitude to make decisions for themselves on behalf of customers.

Create a welcoming environment for your customers

Good customer service can begin as simply as saying “hello” to customers the second they walk in your store. By greeting customers when they first enter, you send a message that you recognize them and appreciate their business. Even if the employee cannot help the customer right away, or even if the customer is just there to browse (for that visit, at least), a warm welcome sets the tone for a good experience in your store.

Few things can be more off-putting to a customer than being completely ignored while in your shop. Not only is ignoring people bad customer service, it’s downright rude.

Offer enthusiastic, practical help

Once again, customers enter your store because they need or want something. Filling that need pleasantly and efficiently begins with finding out what that "something" is. Make sure your employees ask each customer how they can help, and remind them to listen carefully to the answer. If a customer says she’s looking for a dress for a party, that much may be the case. But if you really listen to what she’s saying, chances are what she really wants is an entire outfit to help her look fantastic.

If a customer is looking for something specific, don’t just point him in the general direction of where it’s located. Walk the customer there and show him any other products that might fit the bill. Make sure your staff is knowledgeable about your full line of products so they can not only answer customer questions, but also provide the customer with helpful alternatives. A friendly, enthusiastic attitude is key in delivering practical service. A positive attitude about the products can be infectious with customers, and a positive attitude with customers will help them feel good about buying your products.

At the same time, don’t overdo it. Heavy-handed service equates to bad service. Employees should be helpful and available without hovering, and they should be enthusiastic without being insincere. Crowding a customer or talking her into buying something she doesn’t really want may help an employee ring up a sale one day, but it won’t bring the customer back the next time she needs something. Remember that each interaction has the potential to turn into many more future visits.

Practice the Golden Rule

When training your staff, have them picture how they would like to be treated if they were the ones walking into the store. Too often, retail employees are so involved in their own worlds that the customer goes completely unnoticed or shortchanged. No one wants to stand there waiting for help while the person behind the counter chats on the phone about his plans for the weekend. Practicing common courtesy can go a long way – saying “please” and “thank you” used to be par for the course in retail interactions. These days, such courtesies can actually set your business apart.

Finally, if your employees still aren’t treating customers with the level of enthusiasm or service you want to see, tell them to pretend each customer is you – the person signing their checks. For in the most fundamental sense, this much is true. If bad service drives customers away, no business can operate successfully for very long.