The main reason for structured programming is maintainability. Node programs are structured in the following ways:

• Clear, self-documenting API structure
• Make JS subroutines out of any code that is repeated (duplicated) across any group of APIs
• MongoDB data access routines can be partitioned for shared use, granular down to the field level
• Prototype your app with Node templates first -- go as far as you can go before SPA breakout
• Like any module, an API needs to accommodate exactly the funtionality required, and no more; single place to update