Armor
Creating Costume Armor with Wonderflex: This great Instructables tutorial shows you how to make lightweight and durable armor using a low-melt thermoplastic with woven fiber backing known as "Wonderflex."
Automail
Kyra and BJ's Automail Tutorial: With some decent painting skills and this neat tutorial, one can create some epic, lightweight automail for any character with robotic arms.
Jewelry
Lip Ring/Earring Tutorial: A free way to create piercings without having to commit to them!
Shoes
Making Thigh-High Boots (The Cheats Way): An extremely nifty tutorial that shows someone how to make thigh-high boots that will always be skin-tight.