When managing your network, developing an app, or even organizing paper files, sound security is no accident. Companies that consider security from the start assess their options and make reasonable choices based on the nature of their business and the sensitivity of the information involved. Threats to data may transform over time, but the fundamentals of sound security remain constant.
As the Federal Trade Commission outlined in Protecting Personal Information: A Guide for Business, you should know what personal information you have in your files and on your computers, and keep only what you need for your business. You should protect the information that you keep, and properly dispose of what you no longer need. And, of course, you should create a plan to respond to security incidents.