Furniture, etc.

I use a pretty decent office quality chair and a desk from one of those "Container" stores. [Hold Everything]. Sit4less.com has some nice chairs, but they are not especially inexpensive. Avoid cheap furniture unless you like visit to your chiropractor... or orthopedist.

I prefer a trackball mouse, with 6 programmable buttons. Mine is called Evolution, and it's superb. From itacsystems.com. Great if you have any RSI issues in your hands. I also use a special glove, called SmartGlove, from Imak. It's got special beads inside that protect the palm.

I also use a smaller keyboard, so I don't have as far to reach to get to the mouse. There are several brands available. Check out Happy hacker.