Ideally on every page! Within the side bar of your blog copy and paste in the mailing list form and this way every visitor gets to see the opportunity to join. But, will they be convinced? Probably not, so you also need a clear link to a page about the newsletter. On this mailing list page repeat the sign up form and talk a little about the newsletter. Maybe mention how often you send a newsletter (with me, not very often!), make an offer or incentive for signing up (like my free eBook!) and promise not to sell or misuse email addresses.
There is nothing worse than signing up for a mailing list and then getting loads of spam. Maybe even, if you are using a service such as YMLP, link to earlier copies of the newsletter, this shows the quality of it and can convince more people to sign up. Also, tricks such as the so call slide ups (the new versions of pop ups), which show to new users can also mailing list make sure that plenty of people are joining your mailing list. So, to put a mailing list on your blog, grab the plugin or sign up for a free service, install the capture form in relevant places and make an offer that readers cannot refuse!
It is estimated that over 4,000 e-mails per minute go through the Internet. What this means to you as an information marketer is that you can conduct "direct mail" through the Internet to existing and potential customers. This will eliminate your postage and printing costs. It will also reduce the amount of time needed to process your mail. The Internet also has mailing lists to which you can have your e-mail address added. These mailing lists are made up of groups of Internet users with similar interests. The users send messages back and forth to each other regarding relevant topics.