Although talking by phone with a customer is always the best way to go however if you want people to come to you, social media is a very good tool. It allows customers to come to you without feeling pressured into anything. Once your customer is established with your business, a phone call every once in awhile may be welcomed. I would suggest letting the customer choose the best way they would like to receive communications from you. Also email is a great way to communicate and not come across as pushy