One of the newer resources I’ve found that highly impresses me is “Before ‘I Do'” written by K. Jason Krafsky from http://www.fullmarriageexperience.com/
This is a multi-week study for people who are getting married. What I really liked is that there are a lot of Scriptures presented in a way that even non-Christians might not be turned off. The study is designed to get couples talking to each other rather than just listening to a speech and going home.
One point that Jason emphasizes is that the current generation learned differently than most of us Boomers did and he has designed the study with that in mind.
This is a study that would also be helpful in a reconciliation situation when a couple wants to get a fresh start.