Best way to sleep with low back pain?

Bask: On your back with a small pillow on the lumbar/loin(lower back) area.

To lessen pain: Your body will typically tell you how to best sleep. Find position of comfort and try to rig a way to keep in position. A lot of people find laying on their side with pillow between knees and one behind back and in front of chest to prevent them from turning onto stomach or back.