I assume you have not heard of the latest data fad, Data Governance? Data governance is targeted at solving all the data errors of the past by establishing an elaborate bureaucracy to take over data. There are councils, committees and stewards. There are policies and meetings and meetings and even more meetings.

X-spurts will profess that all organizations have to be mature and embrace data governance. Without data governance your business will face the apocalypse. Data governance will solve business and IT relationship and trust issues. It will clean up bad data and it will ensure excellent customer service.
Of course you could bypass this democratic process and dictate improvements. Or you can permit the current state of data anarchy to prevail.

I suggest a hybrid. Select data management best practices such as data quality that will benefit the business and dictate their adoption. This is the ???low hanging fruit??? and ???just do it??? approach. Then identify preventive practices such as improved database design and data usage practices and embed these into the culture, behavior and processes (e.g. SDLC, BPM etc.) of the organization through enlightenment (not training and education) by showing by doing. This will take years.