08/27/2012 10:06 am ET Updated Dec 06, 2017

WATCH: Is Happiness A Choice? From Gretchen Rubin

Can you really choose to be happy? When Gretchen Rubin, author of "The Happiness Project" and "Happier at Home" joined me on Mondays With Marlo, she spoke about things in our lives that we can and cannot control, and how they affect our happiness.

For more fantastic advice on lifting your mood, see Gretchen Rubin's tips on happiness:

Tips On Happiness From Gretchen Rubin

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