How to make a duct-tape dressform. Cheap and easy, as long as you have a willing friend to go along with it.
Step 1: Why the hell not buy a dress form?
Well, some people would like to make their own fitted clothing without having to pay so much for a dressform. Also, some of us gain a few pounds here, lose a few pounds here, so buying a dressform for a bunch of money when it's not going to reflect our measurements in 6 months just doesn't make any sense!
Besides.. It's duct tap.