This is the place to post questions and discussions on usage and style. The members of the Wordwizard Clubhouse will also often be able to help you to formulate that difficult letter.
Are these sentences correct:
1) It will devastate him if he finds out you have cheated on him.
2) How will it make your life better if you move in with your brother?
3) What will it get you if you leave the family business?
All seem fine to me.