Give a few general guidelines for component design

• Apply the solid design principles
• Design components to be highly cohesive - Do not add mixed and unrelated functionality 
• Components should avoid internal details of other components to promote maintainable and adaptable code
• Understand how components will communicate with each other
• Keep crosscutting code abstracted from application specific logic - This refers to security, communications, and operational management such as logging and instrumentation
• Apply the key principles of the component-based architectural style
• Reusable
• Replaceable
• Extensible
• Encapsulated
• Independent
• Not context specific