I built a diorama for my brother Larry that I documented step-by-step. This was published in the February 2007 issue of Fine Scale Modeler. The seven phases to building and publishing your diorama are oulined on the subsequent pages.
It's not only the cool idea you want to capture in your scene, but also who's is the audience you want to show it to?
Sometimes the inspiration is a cool kit you find and then build the story around it. sometimes you'll have to buy kit's and accessories and then scratch build.
A step that can't be rushed and remember to plan for painting while your building - use sub assemblies
Gravity works. everything sinks into a surface - whether it's a figure with it's hand on the back of another figure or treads on the surface of the ground.
base-coats and highlights; layers and shadows - nothing is ever just one color because of the play of light.
how will you display the piece? It's best to have a solid base for fragile builds. start from the bottom up - literally.
Set up a photography area and use plenty of light. If you don't have a Web page or Blog, print the name, date and description
Inspiration
Procurement
Assembly
Posing
Painting
Presentation
Completion