Entertain them. Keep it light and funny, identify with your customer and resist pushing your products.
Educate them. Provide useful content that your audience can really use, something of value that fits into their daily life. Stay consistent and customers will come back for more.
Reward them. Pay attention to comments from your customers. A simple thank you and how much you appreciate their business or review means all the difference. Show you care and you'll have followers for life!