For the most secure, top-secret, and utterly unnecessary communications. Encrypted Memes for the paranoid and Secure Surfing Tips for the discerning agent.
For the most unsecure, completely-not-at-all-secret, and utterly mundane communications. Bad Ideas that will get you fired, Social Engineering 101 for when you just want to get your aunt to do stuff.
Or, if you're feeling extra paranoid, try our Paranoid Palooza for an existential crisis in one easy-to-read page.