THE WHITE SHIRT
Ah, the white shirt. The workhorse of wardrobe staples. I find myself buying about 8 a year, wearing them out, and promptly replacing them the following year. That I love white is an understatement and the classic white button down pretty much goes with everything. Even though my "everything" seems to comprise of jeans largely.
Dress it up with heels, an unusual necklace, and a bold cuff.