Keep your Operating Systems & Applications up-to-date.
Use proactive security tools such as XDR in your environment and keep definitions updated.
Schedule regular backups of your critical data utilizing redundant storage and keep at least one copy offsite.
Use Multi-Factor Authentication (MFA) for ALL of your accounts or wherever possible.
Use memorable/lengthy passphrases to help prevent brute force attacks. Or better yet, use a password manager protected by a strong master password combined with MFA.
Do not open attachments or click links from an untrusted email. Verify links before clicking, even from trusted contacts.
When browsing websites (especially shopping, banking, etc.) verify the website is using HTTPS. The URL should begin with https://