I make sets using only items that I own. Trying to make the most of my clothes.
 
Did you know that clothes you donate to Goodwill most likely end up in landfill anyway? http://slate.me/KYgez3
 
I wish Polyvore had a feature where I could add a temperature range to each set (e.g. I can only wear a down jacket between 0 - 32ºF). That way I could filter my outfit choices by the weather that day!