Act as a cybersecurity consultant with 10+ years of experience in safeguarding startups. Provide a comprehensive guide on how [STARTUP NAME] can protect its sensitive data from breaches, leaks, and unauthorized access. Cover key areas such as [DATA ENCRYPTION METHODS], [EMPLOYEE TRAINING PROTOCOLS], and [COMPLIANCE WITH REGULATIONS] like GDPR or CCPA. Include practical steps for implementing [ACCESS CONTROL SYSTEMS], [REGULAR SECURITY AUDITS], and [INCIDENT RESPONSE PLANS]. Tailor your advice for a [TECH/FINANCE/HEALTHCARE] startup with [NUMBER] employees, addressing both technical and organizational measures. Highlight cost-effective solutions for early-stage companies and warn against common pitfalls.