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Apps I Live By: Gretchen Rubin

<p>The best-selling author of "The Happiness Project" shares her must-have apps.</p>
Image: Gretchen Rubin
Gretchen Rubin.David Cross

Gretchen Rubin's wildly popular book "The Happiness Project" has been translated into more than 30 languages and spent more than two years on the New York Times bestseller list; her follow-up, "Happier at Home," also became a bestseller. An avid user of social media (visit her blog here), and a self-professed "happiness bully," Rubin is now hard at work on her next book "Before and After," which explores how to make and break habits for a happier existence. Here, she shares the apps that that help her navigate her city and monitor her sleep.

1. HopStop

I live in New York City, and this terrific app helps me figure out how to navigate public transportation when I’m in unfamiliar territory.

2. UP

In my forthcoming book about habit-formation, I describe how the Strategy of Monitoring helps people to foster good habits, and using the Jawbone UP band helps me monitor my sleep, my eating, and my steps per day—I thought it might be a drag, but it’s surprisingly fun.

3. FlightStats

I recently got this app after my mother told me that it was a great way to keep up with flight status information.

4. Instagram

I really enjoy posting images to Instagram; looking for great photo opportunities makes me alert to the world in a new way

5. Twitter

I love social media and usually connect from my desktop, but sometimes when I’m away from my desk for a long time, I use the app.

For more information and inspiration visit MariaShriver.com