When creating your opt-in form to begin email marketing, you should always ask yourself a simple question: why should anyone be willing to give you their email address? What are you going to offer them in return? And how is your list going to give them value in exchange for that personal information?

Often the best answer to these questions is: with an incentive (or 'bribe' as it's often referred to). Here we will look at some options for things you can give away for free that will...