It's always great to find some kind of lumbar support if you have back pain, so roll up a towel to put behind your back when you sit down. Having this type of support for your back will help to alleviate and maybe even help to eliminate lower back pain in most people.
Sitting with knees level or higher than your hips can throw your back out of alignment and cause back pain, so sit with your knees lower than your hips. If you have an old saggy sofa, think about trading it in for something with more support. Proper posture can stop back pain in its tracks.
