You can never go wrong with walmart and target gift cards. Or you can do scented candles for women and a sports mug for men
For mine I did The big yard cups filled with candy. Lolz.
Candles, gift cards, make up bags, candy, star bucks, or coffee mugs with a little pack off star bucks coffee or hot coco. Theres a lot you can do.
Go to Dollar Tree, Michael's, or Target and get some things from the dollar section (candy, flashlights, mugs, little random things). You can get 10-15 prizes and everyone thinks they win :-)
Starbucks gift cards.
Fancy chocolate bars.
Bottle of wine.