The Priest who married me and Mrs DoodleBob gave awesome advice...and it was certainly better than that from divorcées and unhappily married folk. It also helps having a YUGE sense of humor, i.e. "I'd like to introduce you to my first wife."
I actually laughed out loud.
Which is essential, on practically a daily basis, for marriage.
Me and Don-o, 30 years this New Years Eve.