Light up

Lighting would require considerable attention. Different kinds of designs accentuate the décor in a way that adds subtle detailing.

A contemporary room needs appropriate lighting fixtures.

An ethnic setting needs some nice handicraft lamps to create the right background.

Old world elegance is best accompanied with lamps that are ornate/ classic in their style.

Funky style need you to break all those rules.

Of course, you could roll all those concepts into one; this works fine provided it looks like a conscious effort and not just a collection of stuff put together without the required attention.

Decide what the statement is, and choose the visual grammar accordingly.