HELP: Bridal Shower Registry?

Carissa
We're registering for my bridal shower soon and I'm wondering what people actually register for? I haven't been to many bridal showers/weddings so I'm not sure how this works. We're registering at Target and Bed Bath and Beyond but do we register for like bed sets and random things? I know kitchen stuff is popular but that's about it. Is there anything you shouldn't put on a registry? Also, do we have a separate registry for the wedding? Help!