You need to clearly direct visitors to mailing list enter in their name and email address as well as instruct them to confirm their request to join your list (if you are using double opt-in). One thing to keep in mind when developing your squeeze mailing list page is that it should motivate visitors in the same way that a traditional sales page should, however, the actual structure of your squeeze page will be very different.
With sales pages, they are typically designed to offer as much information about a particular product or service as possible, since the main mailing list focus is on transforming a visitor into a customer. With a squeeze page, you aren't asking your visitor to make a decision to purchase or committ to anything other than to subscribe to your mailing list where they are rewarded with a free product.
Keeping this offer or giveaway in mind, when you develop a squeeze page, you need to have a strong focus on your market, and design your offer around an existing problem, need or question. To come up with the best incentive offer possible, you'll need mailing list to thoroughly evaluate your market, as well as competing offers so that you can create a relevant product that is in demand and likely to capture attention from your target audience.