My dog is getting spayed tomorrow :( HELP?

my dog is getting spayed tomorrow. i know im not supposed to feed her tonight and all that but what else should i do to make her as comfortable as possible? we have another male but they never really take much notice of each other anyway. but we do still have 3 of the pups she had at the start of the year and they are always playing together and she is a very hyper dog anyway. what way will she be after the surgery? will she still be as hyper? should we make a room for her to be alone or would she prefer to be around us? im presuming the other dogs should be kept away from her while she is healing? thanks for the help