Post your layout at
www.photobucket.com or other photo site and post link here for folks to click and view.
After you get your plans drawn, you will need to run them by the building inspector before you can get a permit. You can post a link to proposed layout, but the building inspector will want more detailed plans. It's a good idea to visit the building inspector to get an idea of expectations re: the info needed by that office. Too, you can get info on your local building code requirements, such as egress windows in basement bedrooms, ceiling height, etc.
Many folks like a kitchentte in great rooms. These can be attractive bar areas with undercounter microwave and refrigerator, cabinets for storage, and bar for entertaining. Think about what the room will be used for. Many like built-ins to accommodate TV and electronics. These can contain shelves for display and cabinets for storage. If this is going to be the focal point, you will need to keep in mind large enough space to arrange the conversation/viewing area.