It’s not enough to just tell your prospects about what they’re going to get. You need to show them, and make it polished so the perceived value is very high. Just the same way an online shopper wouldn’t buy something online without seeing high-resolution images, your prospects will be reluctant to hand over their contact details without seeing what they’re getting. If it’s a free report or ebook, show them a physical book or brochure mock-up. If it’s a cheat sheet, show them how many pages they are getting.