Websites:
www.mygiftofmikvah.org : For women who are new to mikvah observance
Books:
Setting a Table for Two by Avraham Peretz Friedman
The Five Love Languages by Gary Chapman
The Seven Principles for Making Marriage Work by John Gottman
Transforming the Difficult Child by Howard Glasser and Jennifer Eastey
When the Going Gets Tough by Yisroel Roll