First of all you have to analyze the current market and search for markets within markets that you can cater. A niche relates to these markets in which the demand of the people is not met due to lack of resources available. You are the one who is going to find those resources to meet those demands. But before that you need to make sure that there is steady and consistent demand in that market.
Now you need a product to sell. You can either create your own product or start marketing someone else’s product being an affiliate marketer. While marketing someone else’s product you need to make sure that the product has a good image and it might not tarnish yours being the marketer of that product.
The next thing you can do is establish yourself that you are the best in your services of internet marketing. The easy way to do this is create your own webpage or a blog or a complete website. In the website you can not only write everything about the product and the company but you can also write about yourself. You can also write your own reviews and insights about that product.You may also get your website affiliated with the products website if there is any.
Now with the passage of time your website will generate traffic and with that traffic some regular visitors will also come for new updates. For this you need to be very consistent with your updates as well. Every now and then there should be something new on your page whether it is about the product or some variety in the means of communication like adding videos or article reviews. You can also make them come again by honoring them with some gifts and discount coupons. They will surely come back if you value them and this will make them your satisfied customers. Enlist these customers and whenever something new comes send them an invitation with some offer again. They will give worth to you as an internet marketing professional for this honor and when they do you cash in.