I also use the ArtBins and get them either on sale or use my 40% off coupon at JoAnn's. I really like them for this use and usually have a separate project in each one, although there are dividers (3-4 I believe) and once in a while I will have several smaller projects in a box, using the dividers. These come in clear or in colors.
These bins keep me a lot more organized and I don't loose pieces or patterns for my projects.