Well you can use Referral Program.The referral program system is one of the best ways to get new customers. You can setup the system to make your current customers refer new customers. The customers have a special tracking id that they can give to other people they want to refer. This way, when an existing customer’s id has been used the customers receives a commission. Also, you should refer the customer an account where he can check the statistics of his campaign. It’s better to sign up the customer to the referral program so they can start referring people to your site right away. For the management and tracking mentioned above you can use some ready made soft wares that you can find on the web.
Besides you can even Join Forum Discussions.There are a lot of good forums where web hosting is discussed. You can join this kind of forums and contribute and offer help to others members while keeping your signature with your URL at the bottom of your post. You can post in the signature your weekly or monthly special offers.
So, helping others on this kind of forums can send new customers on your website, meaning more business for your web hosting business. But don’t just go there to post and ad, be active and be a part of the forum’s community.
These are the first three ways you can send more customers to your site, research each one of them because they do work very well. In the second part you will learn about three more promotion methods that can help you grow your web hosting business.

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Tosh
Dedicated Hosting

By offering some kind of special offers you can literally see your traffic soar. You can make a special offer reducing the price of the bandwidth to half, if the price for 100 Mb would be $10 you could make a special offer to $5. This way the customer would save $5 and this is a thing a lot of people are interested in.

Offering discounts is just like the special offers, the customer saves money by ordering a package that has a discount on it, like save 30% if you purchase the hosting for 6 months. Offering bigger discounts will give send you more customers.
Make sure you don’t offer to many discounts since you do want to make profit.