Instead of bending your back to pick up objects (long lever posture), try bending knees and keeping back straight (core engaged) which is closer to the gravity (short lever posture).
Next Steps
You can try spinal stability exercises. A simple exercise that I can advise is drawing your navel towards your spine (this activates transverse abdominal muscles and your natural "corset" of your body). Holding this for 5 seconds, breathe normally. Increase the duration progressively. You can do this in lying position with knees bent or even in standing.
Health Tips
Avoid standing barefoot or standing for too long. Try actively moving after every 5 minutes and avoid staticly standing.