I'm a huge fan of the book "The Five Love Languages" by Dr. Gary Chapman. I've gone on record saying that it may just be the most practically helpful book for marriages, outside of the Bible. Mark Driscoll, who I also happen to be a very big fan of, recently talked about the love languages while preaching through the Song of Songs. The message, by the way, "Sweet to my taste" is an outstanding treatment of biblical marriage. I've posted the video below where Driscoll briefly deals with the love languages. Use this as a primer on the book, go buy it, read it and apply it in your marriage. You will be glad that you did.