By Gretchen Rubin

2011 Happiness Challenge: It's the last video for the 2011 Challenge! Hard to believe that the year is almost over. Please sign up for the 2012 Happiness Challenge here -- whether you've been part of it already, or you're joining for the first time. You're not behind, just jump in now.

For the last month of this year, instead of tackling a theme, I've been discussing a common question: What is the key to happiness? That's a question that can be answered in different ways, depending on what framework you use to address the issue of happiness. The resolution for each week reflects that week's answer. Last week's answer was First things first.

This week’s answer is Love.

Love If... More...