Buy basics that scale: SSO/MFA, MDM for laptops/phones, automated backups with restore tests, a consent/CMP for web/app, and a lightweight DSAR workflow. Add data discovery and DLP when volume grows. The tool is only half the win: you need to assign owners and institute SLAs.

Poor definitions, stale data, duplicates, and weak lineage. Bias and sampling errors skew models. Fix the basics: assign data owners, define business terms, set validation rules, standardize IDs, and implement MDM where needed. Monitor quality with automated tests and scorecards; route issues like tickets.