Make each panel similar in size and shape.
Line panels up in a regular array: avoid jagged edges that catch the eye and distract people from the message
Group a heading, figure and text
to form a single unit. Use larger space between units to visually differentiate them
Use color conservatively, for emphasis.
Use color consistently: e.g., color code an item and use the same color for it throughout, in figures and graphs.
Choose a muted or neutral background color that doesnt attract attention away from the graphics and text