VeraCrypt has replaced TrueCrypt as the all-around, essential encryption software everyone should be using.

For instance, any password info for your computer, financial info (account and social security numbers), personal/private encryption keys, and pics of essential documents can be kept in an encrypted volume on a USB stick that you take with you at a moment’s notice but which no one — we all hope — can unlock.

Dedoimedo has a quick run-down on how to use VeraCrypt. The official documentation has more detail than you probably want to know.