Steam punk designs just look cool, and drawing them isn't too hard, either. This is a quick tutorial on the steam punk design, but you are going to have to do all the drawing -- I won't walk you through on HOW to draw, but how to ENHANCE the drawing via steam punk.
If you make a picture, don't forget to show me! Thanks.
Step 1: Basic Outlines
Start with the basic outline of what you want to punk out. Try to refrain from installing too much detail inside the figure itself. This method helps if you are drawing something big and would rather fill in details via chunks rather than freestyling the entire piece -- that would be used for something smaller and already without any general detail.
Step 2: Refine and conquer
Refine the rough (Or pristine) outline of your drawing, and fill in the large details that keeps your model iconic. If you are just drawing something completely random and just want to make it steam punk-like, just forget this.
Take this time to think of where you want to place the numerous armaments or apparel. . . and stuff.
Step 3: Barf on it (Figuratively)
Gears, switches, hydraulics -- put as many instruments as you want on the thing. The more you give your drawing, the more authentic it looks. . . Well, until you overdo it (There is such a thing, surprisingly).
Step 4: Armors and plates
Here we have an armor plate that sort of looks like a uni-brow on the peashooter. This usually works better for dragons or heavy vehicles, but can look good on smaller objects. Then we need to establish the sheet work -- basically a spiderweb of lines, but be sparse on the seams. There are two ways to do this: the normal spiderweb look, and the shapes tacked together. The spiderweb look goes more toward lighter industry, where you probably made it out of car skin. Whereas the tacked shapes are more like armor, just not. This is like cutting heavy blocks in a neat design and sticking them on a thing for skin.