To protect your sensitive data from being compromised in a data breach, you should take preventive measures:

1. Encrypt your data with strong passwords and/or encrypting software.
2. Always use reliable and secure web browsers and email clients.
3. Set up strong firewalls for your systems.
4. Log off your computer when you are not using it.
5. Implement access controls, such as two-factor authentication.
6. Incorporate anti-malware and antivirus software.
7. Install the latest security updates and patches.
8. Back up all data regularly.