I found this really helpful article in the March/April issue of Brides magazine. As a planner I always try to advise my clients that a seating chart is very important. All too many times have I see guests look like a deer in headlights when there is no assignments. You don't have to do specific seats if you don't want to, but at least assign a table and allow your guests to then choose where to sit.
Preparing one of these is a little like doing a jigsaw puzzle - you have all the pieces and must figure out how to make them fit. Take these pointers into consideration as you creat your layout:
--- Seat elderly guests away from the dj or band so there's a difference between them and the loud music.
--- Tables that are closest to the head table are usually reserved for the immediate families of both the bride and groom. Other family member (aunts, uncles, cousins) should be placed as close to the head tables as possible.
--- If either set of parents is divorced, keep the peace by letting each partent host his or her own table.
--- Seat groups of friends together. If you have single friends who don't know anyone, pair them with other singles who have simular interests or personalities.