If you have a website/blog you should use data capture such as daily updates, competition, registration or any kind of FORM ENTRY (be creative)where you can think people will put their email address, by doing this you can have a list of email where you can use to send a newsletter so that they will comeback again to your website.
Mostly if you have a new website and when visitor stumble your site, 60% of your visitors will not remember your website name, depends if you a have a strong juicy content. If you are using an entry form where you can capture the email address of the visitors you can send them any update of your site and giving them an option to visit your blog..
Just post this is someone don't know how to use their email list in a right way...
