How to target both new and existing customers?

I can target both new & existing customer through many ways. i start with offering discount coupon codes, delivering complementary products, loyalty programs, make it personal when offer customer discounts on his special day. give customer a space to talk about his experience with my products & share it with his family friends on social media. these days it's important to give part of your profit as a help for the NGO's so the customer when buying your products they will give help in a different way. 

You have to be motivated and positive thinker and have a good relations with clients and people around you.

eye catchy deals, free service camps, gift vouchers, refer a friend scheme, Flyers, Yellow Pages, Promotion on company websites, have high margin products, regular payments without chasing,  

The Business or a Firm should be well formatted where we need not to think how to target our existing and new customers. And if we keep up the Quality assurance to the customer, then we do not have to spend our time and money in thinking how to target customers. 

A good or strong strategy must be maintained to achieve the targets and our Customer satisfaction.

We must have good knowledge about our product or service and also the changing Market Trends.