I laughed out loud when I read Planning... Forever Events' blog post about reducing your guest list.
Funny, yes, but a very valid post (sometimes you just have to make it more difficult for people to RSVP "yes").
Saundra's tips are excellent (and the comments below the post are hilarious)!!!
Here's the link to her blog post: http://planningforever.com/blog/2009/01/26/easy-tips-on-reducing-your-guest-list/.