desk seems to clear the head, and an expanding wallet can give you a better working space.
Basically, an paper, files, documents, etc. can fit inside the wallet and rest flat against other papers. An expanding wallet can either be the smaller, more basic version which basically is just a case for paper with the top left exposed. Or, the expanding wallet can come with a flap which you can turn over the opening of the case, and secure on the opposite face of the wallet with a piece of rope of expandable string tied around a button.