Successful companies know that the best way to do business is to keep in constant contact with your customers, within reason. Bombarding them definitely won't score you any points, but neither will keeping them in the dark about new products, services, events, sales, and other offers. Customers appreciate a certain degree of contact, and one of the best ways to passively interact with your clients is to send them newsletter or other generic pieces of information. These days, you can choose to send customers or potential ones snail mail or e-mails by enlisting the help of a local mailing service. Mailing lists are among the most successful kinds of noninvasive advertising. Most customers don't like receiving sales related phone calls, so communicating with them via mail and e-mail is a better way to make contact without irritating them. You may also choose to embark on an e-mail or mailing marketing/branding campaign as well. This involves contacting people who are not yet customers. You may want to have a business mailing list in addition to a customer one because this may lead to beneficial partnerships in the future. It is great for trying to get the word out if you can't afford to advertise on television. If they aren't interested in your offer or information they can simply throw away a piece of mail to delete an unwanted e-mail.