So I was thinking that i didn't explain in great detail about the method of breaking down a detail. First of all you don't require a full blown cad drawing, it can also be a quick sketch on butter paper or scrap paper etc. After you sketch your detail up you then work in with a simple 5 column table (which can also be a sketch).
1st step - Draw detail and annotate it
2nd step - Mark a number beside each annotation on your sketch
3rd step - Fill out table
Write a brief description of the object
Column 3 - 2D/3D
Review the brief description and consider wheather you think you should model it or draft it. if the object will be seen in more than one view type it should probably be modeled.
Column 4 - Modeling type
Decide what revit tool you will use to create the proposed component, is it a floor or a wall or a custom generic model family, etc.
Column 5 - Family type