Careful painting of the sides of the door panels adds to the effect of their depth, and helps coordinate them with the awning and other painted details on the front of this shop. The writing on the window helps to define the shop without distracting from the view beyond.
For tips on adding window details in 1:12 scale you might want to read Create Miniature Stained Glass Effects to find out how to print transparent window designs, or alternatively use Use Ink Jet Decal Transfers to create window glazing or lettering effects.