Well, I have been in the process of moving for quite some time, so I no longer have a desk to keep all my items in, but I have a different tote bag for different types of materials (one for polymer clay, one for my paints, and one for jewelry findings, tools and random things). I work where I can find room. :\ I used to have a problem with my polymer clay because I would rip open the package, use some, and then put it back, and after a while, my clay would get other colors all over it and look really gross. So I cleaned them all up and put the individual colors in cello baggies and now it's much neater.
One day... I will have a studio...