Screens and ABAP Objects - R/3 4.6c

Greetings fellow SAP developers.

Looking for some input here. What's the best way to manage dialog screens with ABAP OO?

Do you encapsulate the screen in an object? So that there is just one method or two methods? As in:

Screen->Init

Or do you break it down into chunks? As in:

Screen->Set_Fields

Screen->Validate

Screen->Handle_Action

Or do you avoid using objects to encapsulate screens? That is, just use objects to encapsulate business processes? As in:

SCREEN_FIELD_1 = BusinessObject->Get_Value_1()

SCREEN_FIELD_2 = BusinessObject->Get_Value_2()

Thanks in advance for your input.

Brett