Plaid prints are going strong but think big and blocky, rather than typical school girl prints. I love this BDG fitted plaid tunic (on sale for $14.99 at Urban Outfitters) and this Silence and Noise long sleeve bib top ($48 at Urban Outfitters).
Here are more bold plaid picks:
Fab Chiffon Plaid Top ($12.50 at Forever 21)
Torn by Ronny Kobo Danna Plaid T-Shirt ($86 at Shopbop)