Deciding where everyone is going to sit can be overwhelming, especially when planning a large wedding. Ms. Meeks says one way to simplify the process is by creating a seating plan online, such as on All Seated. The website offers a free seating-arrangement tool that lets you choose from a wide range of table arrangements, or upload a customized floor plan. In addition to assigning seats, the site lets you log each guest’s meal information, giving you a seating chart that you can then provide to your caterer.