Interview with the Author: Gretchen Rubin, Sing in the Morning

Author Gretchen Rubin reveals one of the vows she made for "The Happiness Project."

Tags: Happiness,
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Check out our collection of Guideposts videos and find exclusive celebrity interviews, inspirational stories of hope, and practical life advice.

"Ordinary Women of the Bible" author Carole Towriss

Carole Towriss on 'Ordinary Women of the Bible'

Lifestyle expert Katie Brown

Katie Brown on the Everyday Blessings of Faith

Bestselling author Karen Kingsbury

Karen Kingsbury's Christmas Gift-Giving Tips

Bestselling author Karen Kingsbury

Karen Kingsbury on Her 'Red Gloves' Christmas Book Collection