I am looking to strengthen my marriage.

Beloved is a good resource

I agree. Beloved: Finding Happiness in Marriage, is produced by Matthew Kelley's Dynamic Catholic. You can view the first episode on this site in "browse" There are 2 Seasons
of a 12-part series available on FORMED. To enjoy the entire series along with bonus materials, please visit FORMED.

Fr. Chad Ripperger has some good talks online for the spirituality and psychology of Christian Marriage.