How can I ensure this won’t happen to me again in the future?

Follow good web practices, such as changing your password regularly, using strong passwords, and turn on multi-factor authentication. We also recommend taking the following actions: 
•    Activate features built into the CAFT system that help mitigate risk—such as establishing limits on transactions and file amounts and enabling dual authorization. 
•    Don’t click on a link that was provided in an unexpected email.