Save your aching back. Get ergonomic.

If you work behind a desk with a computer for any length of time, you need to.

Or pay the price later. I've included a link to an excellent introduction to this "office science" by Whitson Gordon at LifeHacker. Check it out.

How to Ergonomically Optimize Your Workspace

 Whitson Gordon — We spend a lot of time sitting at our desks every day, and while it may not look like it, it can wreak havoc with our bodies. Here's how to set up a healthy, ergonomic workspace to keep you comfortable and injury-free.