Here are some last minute just-bring-yourself tips:
Flowers! always a good option. Know your hostess, I recommend that you buy greens and flowers separately then arrange. Remember to look for different textures, colors, and sizes of leaves and petals.
My favorite cheat: white Hydrangea and Eucalyptus, you can also add a red berry for some color. No fuss to arrange.
Crackers an in, poppers, not the kind that goes with cheese. This is a fun addition to the table and will be a time tested conversation piece. Just wait till you see whats inside!
Hope these recommendations help with the holiday hustle.