We spend a lot of attention on how we interact with social networks, because so many people use Twitter, Facebook, etc every day. It's fun for developers to play with this stuff. However, if you want to look at a history of your own interactions, there isn't a much better place to look (digitally) than your own email inbox.
Before you can explore though, you have to download the data. That's what you'll learn here, or more specifically, how to download your email metadata as a ready-to-use, tab-delimited file.