(1) Exercise. Regular low-impact aerobic activities; those that don’t strain or jolt your back. Walking & swimming are good choices.
(2) Build muscle strength & flexibility.
(3) Maintain a healthy weight.
(4) Quit smoking. Smoking increases the risk of low back pain. The risk increases more with the number of cigarettes smoked per day.
(5) Take care when lifting.
(6) Check your posture when sitting, using a computer or tablets & watching television. https://www.nhs.uk/conditions/back-pain/