Your back pain is now less frequent or does not affect you as much.
Maintain it!
Lift objects with knee bent, and the object close to your body, with a straight back as much as possible. Do this for all lifting, so that it becomes a habit when you do have to lift a heavy object
Sleep on a firm bed. Sometimes fetal position may be helpful for some.
Wear low heel or flat shoes
Make sure your blood tests show that you have normal calcium and vitamin D, otherwise supplement.
Try maintain proper posture. See what works for you: while sitting, you may need a small box/ stool to raise your feet; you may need to raise your chair/ work table height, you may need to get a pillow/ towel/ support at the back if it helps. Make sure your head/neck is in a straight line with your back.
If your job involves mostly sitting, take a 5 min break at least every hour to walk around. Or exercise. One easy way to accomplish this, is to drink water ;).
Try to get other problems addressed, eg coughing for months/ years ( from smoking etc) can cause back pain
Stop smoking. Prevent excessive weight gain.
Finally, continue your exercises most days.