Start with a data map: what personal data you collect, where it lives, who can access it and which vendors process it.
Review consent and notice flows in your apps and websites so they are clear, specific and easy to withdraw.
Put security safeguards in place and prove them — access control, encryption, logging and regular VAPT are the evidence auditors look for.
Prepare a breach-response process so you can notify the Data Protection Board and affected people quickly if something goes wrong.