I find anything designed to organize lots of smallish items works well. I use an old laptop briefcase at home to hold a few patterns and all the paraphenalia I use for current projects. I have a Kennedy machinist's tool box for all my needles and assorted tools for knitting and crocheting that lives in the office closet. I also have a nylon lunch box to carry my current project on the road to knit while out and about.
"Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it's the only thing that ever has."--Margaret Mead