Building your own email address list is the best mailing list thing you can do to promote your business and products. The first step for the promotion of your business is to send an email providing info about your products or services to the all the prospective customers who are on the mailing list. This is a method for promotion which does not require much effort or investment. You can have either an in-house mailing list team for list generation or you can also purchase mailing lists. If you are a Do It Yourself kind of person, the most mailing list effective ways to build an address list is to create a company website that has a newsletter feature. In short, let your customers ask you to send them your promotional materials and product updates. Make sure that your website is highly informative and does not focus too much on making a sale, and many customers will really sign up for mailing list subscription of your newsletter. Remember, it is better to please a hungry crowd that agrees with you than it is to try and convert a crowd who could care less. You can also get in touch with your acquaintances and friends in the past whom you think might be highly interested on your products or services.