Do you maintain separation of concerns?

One of the major issues people had back in the day with ASP (before ASP.NET) was the prevalence of "Spaghetti Code". This mixed Reponse.Write() with actual code.

Ideally, you should keep design and code separate - otherwise, it will be difficult to maintain your application. Try to move all data access and business logic code into separate modules.

Bob Martin explains this best: