WeddingDJ helps you plan out all the music you need at your wedding, using the songs and playlists you have in iTunes. When the big day comes, you hand it off to your MC, who simply needs to slide "next" for each part of your wedding
Number your RSVP cards because some people write a "NO" where they should put their name and you have no idea who it is! Once you get them back in the mail, go into your excel spreadsheet and mark them coming or not coming. Then you also don't have to worry about losing the cards and you can easily tell who still owes you one.