There are many different floor mats that are great for rolling chairs. Make sure that it is suitable for hardwood flooring if you are thinking of getting one. You can even put a little area rug underneath your rolling chair.
Softer materials like felt are always better than harder materials like plastic. Depending on how often your furniture is moved around, you should get appropriate floor protectors. If you have a lightweight coffee table that does not move ever, you don’t need heavy duty protectors. Even though you may think your couch does not move, it does when you plop down on it hard.
Make sure that your furniture is level after you have put on your floor protectors. If not, you can create scratches in your wood floor.