Consider different colour combinations that work with the colour of your container - Contrasting colours offer a vibrant look, where analogous colours are more natural and harmonious.
Combining different heights will give you a fantastic dynamic look. Place tall succulents in the centre of your design as a focal point, then small trailing succulents around the edges. Fill in the gaps with medium sized succulents. The effect will be a balanced look that is pleasing to the eye.
Use an odd number of multiples for particular species - It will balance out your design. Place multiples in a triangular pattern so that they are equally spaced apart.
Don't be afraid to pack many succulents into a small space. Succulents are more than happy to coexist with each other in tight places. Plus it will help to make your arrangement look more compact and lush.
Your imagination is your only limit! Scrounge around your home, back shed, local op-shop or salvage yard - You would be amazed at what spectacular artworks you can make out of the most unlikely of objects!