or you can buy it after your hurting - either way, you'll find the most comprehensive, most complete, well-planned, friendly book on this subject you will likely find.I work just about 8 hours a day in two workstations and then I go home at night and waste more time at the keyboard - just like the rest of you reading this. When my back and arms and hands and neck and shoulders hurt - now I know why and what to do about it - or not. It's amazing to me that these aren't bundled in with every computer sold. Illustrations are good, too - and the layout is very enjoyable. Why are you waiting?