Know what you’re drawing
Gather reference! Build a mood board for whatever it is you’re designing. It can be composed of anything that inspires you for this particular character or series. Yet before you even start sketching, write down a one-line description for each character. This forces you to decide on the most important aspects of the design you’re about to draw. For this project I also used keywords for every faction I was designing. Words like rust, steam and revolution helped me stay inspired and consistent as I came up with variations on a theme.