3. The Oversized Blazer — You might have one of these from last summer, but this spring's oversized blazer offers just a bit more structure and attitude than the slouchier versions from seasons past. In a bold color or print, the oversized blazer is the perfect springtime layer under a top-coat or poncho, or, when it's warmer, all on its own. 

Stella McCartney Lucette Striped Blazer, $1,589, available at My Theresa; Nasty Gal Boardwalk Blazer, $58, available at Nasty Gal.