General Privacy:
Nuts and Bolts of Encryption: A Primer for Policymakers
A very good introduction to encryption.
Cryptocurrencies, Blockchain, and ICOs explained
Tips for maintaining privacy online
Although written for developers there is good information here.
Going Dark
Online privacy and anonymity for normal people
Diceware Passphrase
The new standard in strong, easy to remember passphrases
Messaging:
VPN:
Many of the sever locations touted by VPN’s have now been confirmed to be “virtual locations” meaning they are not in fact located in the particular countries. Make sure your VPN is not on the list. See research at RestorePrivacy for more info.
That One Privacy Guy
A comprehensive overview of VPN providers.
What to look for when chosing a VPN
One-Time Pad