Tips for a happy marriage

A 34 year-old Texan has offered up some tips for a happy relationship on a blog he shares with his wife. His post went viral, being loved and ridiculed by all and sundry. It received 40,000 retweets. One of his tips was that no one should ever hear anything bad about your spouse from you. Is this unhealthy bottling up of frustration or being respectful to your partner?