Spray paint all your pots the same or different colors, or leave them natural, your choice
Add dirt to your bottom pot and pack well since it will support the weight of the pots above
Repeat stacking and packing
Be sure not to fill pots too full. Allow room for the plants
Set your plants in the pots to check for placement and aesthetics. I used creeping Jenny, begonias, and impatients, all shade plants since mine are in my porch
Sit back and enjoy!