I store all my Cardstock 81/2 x 11 in a Magazine holder from the $1.00 bin at Target.
I have about 6 of them. They are made out of Cardboard. Each of them are labeled as to which Company they belong too.
And I don't cut down my cardstock until I get ready to use it. This way I won't waste it.
Creative Crew Member Sept - Dec. 2014