Make it easy to subscribe. Post a signup form on your homepage, blog, Facebook page, and wherever else your customers and fans are already active. You might want to collect names and birthdays (for a special offer or gift) or invite readers to join groups, but don't go crazy with the required fields. A too-long subscribe form might scare people off.
Thanks Kelly, Mailchimp have definitely come a long way with their UI over the years, it’s just their service that hasn’t caught up ;) I haven’t had the chance to play around with Pure360 as much as I’d like, but I’ve heard the same things echoed by several friends who use their service. Looking at their client list, I think they’re more aimed at large companies though.