Rule 10: Do a dress rehearsal.

Rachel Zoe doesn't just go for the first clean item in her closet. Why? Because style takes time. Don't leave choosing an outfit to the last minute. Try on several options and perfect your ensemble well before wearing them.

 

 

Rule 11: Don't buy on impulse.

"Go home and think about a potential purchase. It will either stick in your head or disappear," says Mimi Scantamburlo, accessories manager for Dotti.

 

 

The conceal and reveal strategies in the picture are from Bradley Bayou's The Science of Sexy.