You might have the greatest product since sliced bread, but if you can't sell it, your business won't last. Even if a customer doesn't need to be convinced to buy from you, effective sales technique can enable you to get them to spend more.
When selling, you must be enthusiastic, focused and self-confident. Don't communicate negative messages to customers verbally, visually or in your marketing materials.
Effective selling isn't about telling lies. If you get found out, customers won't come back. They'll tell others to avoid you, too. And if you want to attract customers, you should always stress the benefits of your products or services - not merely their features.