Here is the talk I gave at the Centre for Investigative Journalism's "Introduction to Digital Security" talk held on the 25th of March, 2013.
If you'd like to contact me, please do. E-mail me at email@example.com. If you'd like to encrypt your e-mail with PGP, you'll need my key. You can also find it on the MIT PGP keyserver.
Also, thanks to Alec Muffet who acted as my Greek chorus. He has a wonderful talk about data hygiene called "Sex Lies and Instant Messenger". Go and read it. And then follow him on Twitter.