Apples + Oranges = Cool

JoAnna Henderson via Desire to Inspire
Vintage + Modern

jcrew.com


Dressy + Casual


House Beautiful
Rustic + Modern


House Beautiful


Warm + Cool


jcrew.com
Masculine + feminine

People.com

young + old

mikkel vang in Domino from Flickr

Round + Square

Domino form Flickr

Rustic + Industrial

It's all in how you pull it together.  Too much of one style looks forced and cataloguey.