I got this leather vest a few years ago, but I only wore it a few times... I always felt like it needed something, but I didn't know what until I bought a bunch of studs and started messing around with them. I'm now on a craze of studding everything :)
Also, when I say "leather" I mean either leather or pleather, I just cant take the word "pleather" seriously.
Obtain a leather vest. Perhaps you own one. Perhaps you own a leather jacket that you wouldn't mind cutting the sleeves off of. Perhaps there is a Salvation Army, consignment shop, second-hand store, or yard sale near you that has a leather vest with your name on it.
Obtain studs. You can get a bunch of whatever variety you would like (there are a lot of varieties) at studsandspikes.com. I used 3/8 inch pyramid studs.
Sketch out on paper where you want to put studs. The drawing doesn't have to be pretty, it just has to be coherent enough so you don't forget what you're doing with the stud in your hand.
Begin studding! I recommend listening to Joan Jett as you do this. It just makes it more awesome.
(If you don't know how to stud things, basically you put the stud where you want it, push the prongs through the fabric and then fold them in with pliers/girl power. If the material you're using is too thick to be punctured by the prongs, use a seam ripper or other sharp pokey thing to poke holes where the prongs go.)
Try on your studded vest! Add more studs where you see fit (and remember you can always add more, but you can't remove them...well you can, but there will be little holes)
Jump around in your vest like a badass feminist! Show of your craftsmanship! Wear boots! Scream the lyrics to "Bad Reputation"! Wake up your neighbors!