I have a desk job. How can I lower my chances of having back problems from sitting down all day?

There are several precautions you can take. Stay in good physical shape. Take breaks, and do some regular stretching. It is crucial for you to use good posture. You need to set up your work station in a way that lets your spine stay in proper alignment. A physical or occupational therapist or another ergonomics specialist can help you design your work station. Finally, avoid injuries to your back, and don't smoke.