I'm pretty happy with my actual working environment.  I alternate between my Aeron and Leap chairs, have a cord-less keyboard and mouse, and use two monitors.  Though the ergonomics of my situation could be improved slightly (maybe by throwing in some feng shui ), I feel comfortable when I work. 

It seems that work comfort was on the mind of New Zealand's Occupation Safety and Health Service when they passed these ergonomic guidelines for the workers in the nation's now-legal sex trade:  

• Beds and workstations should support the worker’s back and allow for services to be performed without strain or discomfort.
• Beds and massage tables should be adjustable to allow employees to use them without strain.
• Employees should be trained for safe use of equipment and techniques.
• Workers’ clothing should be comfortable and should not affect the employee’s posture.
• Workers should take breaks between shifts and clients to avoid stress and fatigue.
• Workers should alternate between repetitive and non-repetitive activities.

Certainly some good tips here for all us workers in the "service" business.