nail down (someone or something)
to make certain or sure of something
I am trying to nail down the exact time that the meeting will begin.
Most Popular Xmas Vacation Destinations
Key West FL
For families that want to get away from it all, the last outpost in?the Florida Keys has serious appeal. Over the holidays the historic streets of downtown?Key West?are decked out with Christmas decorations, and families can choose from among?a pleasingly diverse array of listings ranging?from condos, cottages and villas to yachts and houseboats