There are two basic ways to achieve this: - Getting site visitors to opt-in – This is the ideal and most effective way to have a list of interested subscribers. Give them more control over the content they want by allowing them to subscribe to specific updates such as “advertising law blog content.” - Manually adding contacts – You can automatically add prospective clients to some or all your mailing lists. Bear in mind that this may aggravate some people, so be sure to at least always include an “unsubscribe” button.