If you're not sure where to register, make a list of stores that you like and go visit them. Think about what you need and want for your home and pick the store or stores that offer those items.
For example if you and your fiancé love to cook, you may want to choose Williams-Sonoma. If you're looking for furniture, Pottery Barn would be a good choice. If you need items for every room go with a department store like Bloomingdale's.
Kitchen and dining items make up the traditional registry, but if you don't need china and glassware, then pick a store that has products you can use. Are you sports enthusiasts? Register at a sporting-goods store. Wine lovers? Ask your local liquor store if you can create a gift registry of your favorite wines.
Guests will want to buy you engagement, shower and wedding presents, and it's better for you to have wish lists at your favorite stores than to risk receiving gifts that you don't need or want and can't return or exchange.