O'hare Airport Dining
My go-to place in the airport is Wolfgang Puck's, for their salads, sandwiches, etc. Terminals 1 and 3.
I've heard they recently opened Tortas Frontera, a fast-food outpost of Rick Bayless's empire, in Terminal 1, with another to open soon in Terminal 3, but I haven't been there yet.
Also don't miss Garrett's Popcorn, in Terminals 1 and 3. They have caramel popcorn (with or without cashews or pecans), cheese popcorn, or the "Chicago mix" of the two. They make it fresh in the airport store, so it's just like their stores downtown but without the long lines.