Hiya!
- A big (2.5' x 4' or so) white board that lays flat on the table
--numbered and lettered "furniture feet pads"...those little felt 'pads' with a sticky bit on one side that you stick to the underside of the feet of tables, chair's, etc so that they move easier and don't scratch wooden floors. They come in all sizes, I use 1" size mostly, but sometimes the smaller ones, and I cut-out of a flat sheet of it other sizes/shapes as needed for unusual sized or large/long (like giant snakes, horses, giants, dragons, etc). I use these on the white board if we feel like a combat is going to get complicated (usually we just play Theatre of the Mind style).
- Custom drawn maps on large sheets of paper
- Occasionally I'll use my 65" 4K TV to display some particular monster, location, item, etc...but we usually just play a multi-hour long "RPG Music" video from Youtube on it for background noise.
^_^
Paul L. Ming