If your work involves sitting in front of a computer for any amount of time, take a moment to read the following post from Lifehacker:
From personal experience, I have done everything but the software enforcers, but that is what I’m going to be trying next. I see so many people working with laptops on plain desks which puts your wrists at a bad angle, you back in a strange position, and your eyes staring down. So consider that the perfect holiday gift to yourself is to get a real mouse and keyboard that you can plug into your laptop, and a stand to put your laptop up at eye level.