Often a roost bar or step is added in front of the box to give the hen a place to jump to before entering the nest box. Also a "lip" is added to the front of the nesting box to keep the bedding material and/or eggs from being pushed out.
Aromatherapy for chickens! Fresh or dried herbs in your nesting boxes not only work as insecticides, but also have anti-bacterial properties, and can act as natural wormers, anti-parasitics, insecticides, rodent control, stress relievers and laying stimulants. Here is a partial list of common herbs and flowers and their beneficial properties: