It's no wonder that this New York Times article on "The Science of a Happy Marriage" is the most popular on the paper's website right now! Between Tiger Woods' and Sandra Bullock's shattered marriages, cheating and divorce are all over the media these days. So is there an exact science to a happy marriage? The article explains the possible role of genes (maybe even a so-called 'fidelity gene') and some experiments in couples to identify trends in the minds of possible cheaters. But beyond psychology and genetics, it seems that good old hard work can go miles in saving a marriage. Get some great tips on investing in your marriage and trying to save it after infidelity.