The general formula for writing a sales letter is to state a problem your visitor has, give a solution, prove the solution works and ask for an action. For example: Many people are struggling to pay their bills. I have a solution. Create a business that will provide you recurring income. My Internet business is creating a very comfortable income. Enter your first name and email address to learn how to duplicate what I'm doing."
You get the idea:
1. State of problem
2. Provide a solution
3. Prove your solution works
4. Ask the reader to take action.
Remember the purpose of your landing page is not to create a sales. It is an opportunity for you to engage with your visitor. Once you have a visitor in your sales funnel start building that relationship of know, like and trust that results in a loyal customer and a friend.
One thing I will say though, Jetpack is not reccomended by many here at WA for the reason that it is too many plugins in one and can cause serious problems.
As far as I understand Kyle has blocked the use of Jetpack from WA users, in the motive of helping people to not run into these issues.
All the best
Jason