Pick your plants. From Echeveria and Aeoniums to Sedums and Pachyphytum, there are a huge array of succulents with different shapes and textures.
Begin by soaking the moss in water so it is saturated, then remove it from the water and squeeze out any excess. Then pack this moss into the wire form tightly enough so it holds shape. Or, if you have bought a pre-filled moss frame submerge the whole thing in water to saturate it.
Plan your wreath by laying down the structure and surrounding it with the succulents to create the visual display that you like.