What were you doing one year ago today? Were you living in the same house? Eating the same things for breakfast? Or has your life changed in major, earth-shaking ways?

Either way, it's always interesting to reflect on your past, and Timehop makes it super easy.

Timehop is an email service that pulls from your Facebook, Twitter, 4Square and Instagram accounts to deliver a daily blast from the past. At first, Timehop emails feel a little strange, but as you get used to seeing it in your inbox, you begin to realize just how valuable the reminders can be. It might send you a note about the first time you met your significant other. Or it might tell you that last year, at this time, you were wearing the exact same outfit. You might even receive a beautiful photograph that you haven't looked at in months—nothing takes you back quite like a perfectly timed, touching snapshot! It's a mixed bag, but that's part of the fun.

We think Timehop is a very cool way to chart personal growth. Sure, some things stay the same from year to year. We're still taking pictures of our best friends at the beach, and we're still posting Twitter updates about the weather (whoops!). But we've also made many significant strides.

There can be no growth without reflection. Where were you a year ago? And where do you want to be a year from now? Think about it... and sign up for Timehop!