One great trick is to make a hand-shaped piece of ice to throw in your grog.
All you have to do is fill a nonpowdered, nonlatex surgical glove with water and freeze it. Important note: Make sure the glove is not latex; some people have latex allergies -- that would really make your party scary. You can get them at local pharmacies and drug stores.
10 c. cranberry cocktail
3 c. orange juice
1 c. lime juice
Sugar to taste (optional)
Vodka, tequila or rum to taste (optional)
Mix all of the ingredients in a large punch bowl, hollowed-out pumpkin or kettle. Serve chilled (make ice cubes from one of the juices or apple juice.)