Smart is used with these nouns as the subject:
eye

be
look, seem, sound
become, get
Companies are getting smart about how they use corporate planes.

make sb
A little information makes you smarter.

extremely, fairly, very, etc.
enough
She's smart enough to know what works and what doesn't.

Smart is used with these nouns:
bomb, boutique, boy, businessman, businesswoman, card, choice, clothes, consumer, decision, fellow, guy, hotel, kid, lawyer, move, people, person, phone, remark, restaurant, salute, save, shoe, shop, shopper, suburb, suit, thing, uniform, woman