Destruction of personal data as well as confidential business information is an important and preventative step to insure that vital documents are not compromised.  
Your company needs to know what to shred and what to retain until it is legally appropriate to destroy it.
Recommended for shredding guidelines:

LEADERSHIP OPERATIONS
Strategic Reports Manuals
Budgets Training Information
Legal Contracts Activity Sheets
Correspondence Contracts
HUMAN RESOURCES General Service Information
Payroll Information Health and Safety Issues
Performance Appraisals Appraisals, Product Testing, etc.
Applications PROCUREMENT
Disciplinary Reports Supplier Records
Promotions Supplier Specifications
Medical Records Supplier Purchase Orders
Treatment Programs Supplier Confidential Information
RESEARCH AND DEVELOPMENT Corporate Records
New Project Information PERSONAL INFORMATION
Reports Social Security Numbers
Formulas, Product Plans and Tests Credit Card Numbers
Specification Drawings Bank Account Numbers
ACCOUNTING Home Address and Telephone Numbers
Payroll Statements Other Personal/Proprietary Information
Budget Schedules SALES AND MARKETING
Internal Reports Custom Lists
Supplier Information Contacts
Customer Lists Strategies
  Advertising
  Activity Sheets
  Training Information

Nothing contained in this website is intended to be legal advice and should not be relied upon as such.  Customers are encouraged to consult with their own attorney if and when they have questions regarding their legal obligations.