Time after time, leveraging a huge email list can create enormous profits with a simple text email. One proven method to rapidly create a targeted optin mailing list follows the "PCP" mailing list strategy: Plan - Outline your process thoroughly before you take action. Start with some basic research on your target market: Are there any specific problems you can provide useful information about? How much volume does your market provide? How much competition is involved? These are some important questions to answer before you get started. From my personal experience the best market to target is a market your genuinely mailing list interested in, like a hobby... something you'll enjoy sharing with others. Identify your market's potential using some free research tools like the Google Keyword Tool or Quantcast. Spend some time looking at the keyword phrases people use when searching for similar information. Check the demographics of similar sites using Quantcast or Alexa and find a successful model for you to follow. This is no guarantee of success but, even these basic research techniques will enable you to make a more informed decision. Create - Assemble mailing list the necessary resources needed to deploy your optin campaign. To fully complete an opt-in campaign four main components are required; hosting, autoresponder,a website, and a incentive(free gift).