There are two craft supplies that I allow myself to buy in unlimited quantities.  One is floss, the other is felt. Both floss and felt are super cheap and don't take up too much room - both very important qualities in a stash. Since I've already talked about floss, it's felt's turn.

I only buy acrylic felt, because I'm allergic to wool.  You can find acrylic felt in tons of colors and embossed patterns.  I buy most of my felt in small 9" by 12" sheets that cost around 20 cents apiece.  I also have a nice stash of felt from bolts (started by Marietta) that I keep tucked under the craft table.

The stash of felt sheets is kept in two file folder boxes with snap-on lids that stack.  One holds all the rainbow colors.  The other holds neutrals, heathers, prints, and embossed felt. Each color is put in a manila folder to make it easy to take out and slide it back in.

I keep track of my felt colors using 3 x 5 cards.  I bundle my felt cards with my floss check-off list using a pretty purple asparagus rubber band (I should keep more of those).  I carry them with me everywhere I go in my pocket organizer.

I've also noted which color of embroidery floss most closely matches the felt colors (see top photo).  When I'm making a felt project and I want the floss to match, I just check my cards.

They came in super-handy the first time I stumbled across Daytona Braids and Trimmings in New York (251 West 39th Street, 212-354-1713).  They have almost every Kunin Felt color available.  I used my cards to figure out which colors I was missing, because the felt costs 50 cents a sheet at Daytona.  Plus, who wants to lug 10 pounds of felt around New York all day? I mean, if you don't have to.