At a law department where I have done some work, several of the lawyers have two monitors in front of them. They can keep one or more documents open on one and their email and web searches on another, for example. As the price of monitors declines and lawyers facility with software increases, the availability of large, flat-screen monitors at affordable prices may help with productivity (See my post of April 23, 2006 on ergonomic considerations.).
At the same department, many people work in cubicles or shared offices and wear headphones as they work. The headphones block out some of the ambient noise and allow the lawyers and paralegals to concentrate. On the other hand, traditionalists and opponents of telecommuting might not like it that workers are listening to music (See my post of Dec. 17, 2007 about artwork in law departments.).