I switch around positions a lot. Everything from Indian style, to butt on floor one knee up, sometimes knees on floor, butt sitting on my feet. Sometimes leaning back on the couch.

One other thing that has had a huge impact is that I cut a piece of foam roller about 10 inches wide and I roll my back on it 2-3 times per day, sometimes I just lay on it and just reverse stretch my back, and also massage my neck and shoulders with it. That might even be why I don’t have back pain anymore (Important not to roll it on your lower back with all your weight on it, just keep it to the upper part of your back.)