I've always mentioned keeping an organized guest list, budgeting spreadsheet, photo list, and seating chart. I looked around for templates, but couldn't find any that I could easily edit myself, so I made my own.
These custom templates were extremely helpful to me, so I thought I would share them with other brides-to-be.
We found this was the easiest way to plan out where people were sitting. You can easily see all of our guests at a glance and move people around quickly. Our vendor uses this exact template for the wedding day.
Also note the colored areas for vegetarian, children or other meal selections.