What steps can be taken to prevent PS4 error CE-30002-5 from occurring in the future?

To prevent PS4 error CE-30002-5, consider these steps: always shut down your PS4 properly through the power options (avoiding sudden power disconnections), ensure your system software is up to date, avoid physical shocks to the console, and if you live in an area with frequent power outages, consider using a surge protector or an uninterruptible power supply (UPS). Regularly backing up your game saves also mitigates the impact if the error does occur.