One of the first thing's to remember when creating your seating arrangement is to always plan and start your guest list early. Start by perhaps creating a spreadsheet of tentative guest or list on a sheet of paper everyone that's possibly attending. Decide if you want a head or sweetheart table for the bride and groom. Do you want to do traditional seating or switch things up a little bit more modern day? For peace of mind always make certain guests who do not get along do not sit together. Sitting friends together is always a hit but mix and matching old friends with new ones is also a cool and great idea.
Whatever you decide just try and make certain everyone is happy with their seating arrangements so that they can have a great time!