It depends, where are you, whose your targeted audience, what are you doing, the product you have, product or service prices etc.? Whose your competitor and what they are doing?
Anyhow, whether doing online or offline business, be patient, give value don't just sell your product or services. Clearly define your prices and offer to customers. Don't sell them just product respect them, ask for suggestion and request them to refer you to their family and friends.
Last but not least do some proper marketing for your business.