Develop a referral program. Just like in other businesses, people who are referred by others are easier to convert to a sale than people who weren't, because they're usually coming to you with some interest in buying. Many people you talk to won't be interested in buying right away, but they might know people who are. Happy customers may want to share your product or business. You can develop a referral program to give people incentive to refer others to you. For example, you can give them a 10 percent discount on their next purchase for every new customer they refer.
Lead scoring is a way to qualify leads quantitatively. Using this technique, leads are assigned a numerical value (or score) to determine where they fall on the scale from “interested” to “ready for a sale”. The criteria for these actions is completely up to you, but it must be uniform across your marketing and sales department so that everyone is working on the same scale.