Basically I'm doing the same method as this one by alaskasunshine:
http://www.quiltingboard.com/t-43871-1.htm
I just got some other supplies mentioned on this board that other people use to see which I like best. I love the colorplast boards but it's expensive unless you have a connection with a sign shop.
If you have a sign shop near you talk to them. Maybe they will give you a deal.
The cake boards are made for sheet cakes and are just like the colorplast except they are all corrugated cardboard and cheaper.
If you get them with a Joann coupon they are about $3.60 for 6 and you can cut each board into 4 for 24 boards.
I am finding the comic book boards are nice also especially for smaller pieces of fabric.
I'll just use what I have until I'm done then if I ever have to get more I'll figure out which I like best and get those.
I don't want to use regular paper clips because the metal sometimes marks the fabric so that why the plastic and vinyl coated.
:-D