I wanted to pass on an additional tool I just found to handle your project files. Sometimes I have scribbled notes, etc. on my folders, that are in progress. There is no need to do that with these folders. These have preprinted spaces for various entries. The only issue is that these folders are not tabbed at the top. Here is the link from a shopping site that shows vendors who carry these. What a simple idea that really helps me with the GTD process !
http://www.thefind.com/search?query=cardinal+project+jacket+preprinted
http://www.thefind.com/search?query=cardinal+project+jacket+preprinted