The first thing you want to be sure you don't do is get over-zealous. The one thing you need to avoid at all costs is spamming. Spamming is still used widely, but with the government establishing more restrictions and fines you don't want this to be a problem for you. The professional image of your site will also suffer if you send mail blatantly.

Spamming requires a database that contains a huge list of e-mail addresses set up so that the message can be delivered with one click. The problem with it (aside from the governmental restrictions and associated fines) is that it irritates the recipients and kills the validity of your campaign, which in turn kills the factors that would motivate someone to refer your site.

You need to personalize by creating your website with personal appeal. You must see to it that your website makes your customers feel safe, secure and cared for. E-mail is important, because it is going to be one of the most affordable ways to keep in touch with your customers.

The proper way to handle email permission is to first let your customer know that you will not transmit their e-mail addresses to third party companies. The next thing to do is to attach the need for their e-mail addresses to benefits they can receive.

For example: Coupons or discounts that are only available to members who receive e-mail notifications. With each e-mail you send the viral marketing effect takes place.

A study by Sharpe Partners, an interactive marketing agency, revealed that 89% of adult Internet users in America share content with others via e-mail. This is excellent news for those companies who use self-propelling word-of-mouth e-mail techniques to sell their products.

The study generated some interesting results regarding the type of content that is most often forwarded, as well. The most popular content is humorous material.

The second most popular category is news, followed by healthcare and medical information, religious and spiritual material, games, business and personal finance information and sports/hobbies in that order. So it is easy to see that humor is the best content for your viral e-mail campaign.

Cartoons, jokes and funny video clips are among the things that can be added to an e-mail to insure that it will go viral. People will want to pass along something that makes them laugh.

They are a lot more likely to hit the forward button and send your email to their friends and relatives if it is an "advertainment" rather than an advertisement.

Not along ago, about 35 million people got an e-mail containing a picture taken in Disneyland. It took a minute to see it but there was Donald Duck lying prone in front of the famous Cinderella Castle. The title of the picture was "Bird Flu has hit Disneyland". It was a viral e-mail advertising Disneyland and used the edgy strategy of making light of what's serious and it works.

I'd guess that most people who own a computer have seen that picture and thus the advertisement for Disneyland. The bird flu epidemic is newsworthy and has the potential to attract an enormous amount of attention to any brand that might, for whatever reason, associate itself with it.

Remember that people are much more likely to share a joke or a funny picture than anything else so you would be well advised to include humor in your e-mail campaign.

So there you go! Those are the sneaky ways you can apply to your subscriber's email addresses and thus, increase your viral marketing potential.