You can make a full list of things which you can keep in your mudroom. Some of the things are essentials which a mudroom needs while some add to the look of the room. Hooks or pegs are important to hang your jackets, coats, hat, etc. You need a nice storage space where you will be keeping your shoes. Then do try and place a long bench where people can sit and remove their footwear with ease. You can bring in some trendy bench and shoe closet to make the mudroom look attractive.
Make sure to place a nice rug at the entrance so that one wipes off the dirt on it from the footwear before entering the mudroom. Placing a nice mirror in the room is a nice idea. The preferred flooring option for the mudroom would be tiles. There are other mudroom accessories available which can be bought in.