1. Create a content-packed blog that is full of meaty, actionable information. Add an opt-in form on your blog. People who visit your blog will subscribe to your list if they see that you know your stuff. The trick is to position yourself as authority on your market and an expert who knows his or her stuff.
2. Send your traffic directly to a squeeze page. This kind of page is the best kind of page to grow your list at a stunning rate. You need to get your visitors so curious as to what's on the 'other end' that they will subscribe to your list without a hesitation. A squeeze page can do a great job of doing that.
3. Keep your sign-up page short. Since you're not selling anything, you don't need a long sign-up page. Just a short page with a killer headline and benefits in bullet form will suffice. Your opt-in form should be simple and to-the-point as well.
4. Ask your subscribers to help build your list for you by providing them with incentives to do such as receiving one of your products for free or getting cash prizes. Your list subscribers will gladly promote your squeeze page as long as there is something in it for them!