Sales strategies have come a long way since the days of door-to-door salesmen and cold calls. In today's day and age, there are a variety of sales strategies that businesses can use to retain and grow their customer base. One sales strategy that has been proven to be effective is "subscribe and save." This strategy allows customers to sign up for a subscription to your product or service, and then receive a discount on future purchases. This not only helps to grow your customer base, but also helps to retain customers by giving them a reason to keep coming back. Another effective sales strategy is to offer loyalty programs. This can be in the form of a points system, where customers earn points for every purchase they make, which can then be redeemed for discounts or free products. This helps to encourage customers to keep coming back, as they know they will be rewarded for their loyalty.

Finally, another sales strategy that can be used is to offer discounts or coupons. This can be done in a variety of ways, such as through email marketing, social media, or even in-store. By offering discounts, you are giving customers an incentive to purchase from you, which can help to increase sales and grow your business.