Second part, is cutting out your pieces from the fabric you plan to use. I marked each piece on the top corner so I didn't mix up the strips while I was sewing. Especially since they all look similar... Here's a front & back view of the main corset sewn together. It'll be lined, and the seams flattened. The red-orange in the middle is actually yarn twisted into a thicker cord, then covered with fabric, and stitched between the two pleather pieces. I didn't have a cord or string handy, so this worked just as well.
I was having a hard time deciding which fabric to use for this corset... I had left over velvet, except you couldn't see the individual lines properly while using that, so I used this instead. It leaves a smooth edging, and I had a bunch kicking around from making gloves, belts and boot covers. Pleather is always handy stuff~ I'm also feeling particularly lazy, and will probably add a zipper in the back, and decorative hooks along the center. That way all the pull is on the zipper, so less worry about something getting ruined. Second option was adding eyelets & stringing it together, I always worry something will fall loose... decisions, decisions...
Now important info! Interfacing, lining, and boning are required to make a proper corset! For those of us who are not well-endowed up there, and/or crossplaying, you should still at least add interfacing, and a plastic boning so it keeps it shape better. For those who are busty, you want support, and most plastic boning won't cover that, so you'll need something stronger like metal. There are lots of great corset tutorials online, so check a few out before you tackle this for the first time. :)