Keep your belongings within your reach
Choose the right office chair that has better ergonomics
If your chair does not meet your requirements, you can keep a portable adjustable backrest
Your arms should be correctly positioned so that there is no strain on your upper back
Choose the chair that provides adequate support to your Lumbar/lower back
Don't slant or slouch all the time. Maintain a good posture
Make sure that your knees, legs should not be compressed beneath the desk. Ensure proper movement of your limbs
Don’t keep sitting for longer hours at a stretch. Get up every few hours and move around
Keep your monitor at arms’ length away
Wear comfortable shoes for moving around the office, this will reduce a lot of stress on your back while you walk