Email Marketing
I just learned about a new e-mail marketing service. Zoho, Constant Contact, Godaddy, and SalesForce are some of the providers I was aware of, but I just learned about Mail Chimp. It's a service that provides a free account for up to 500 people on your list.
The pricing ranges from free to $240/mo if you have 50,000 people on your contact list. It's definitely worth a look. They also have a comprehensive e-mail marketing guide. http://www.mailchimp.com/articles/ Check it out and remember to keep your spam down and always make sure there's some valuable content in all the emails you send out. Don't send anything you wouldn't want to receive yourself.