A simple way to say "western" in your decor is to add elements of natural wood. This house is pretty much all the way western:
It can be added in small bits and pieces, though, if you don't want to be locked in to one "theme" throughout your house:
I love how this otherwise stark, shiny kitchen, gets a dose of natural "realness" from the rough wood butcher block top on the island. I think it is refreshing to have natural elements thrown in to any design to keep it feeling real and homey.