Ask HN: How to learn to sleep on your back?

Hi. Do you know any techniques, tricks etc. how to learn to sleep on your back? I tried yesterday night and after couple of hours I gave up. I was just about to sleep, maybe even sleeping a little bit but then I was awake. After few cycles I was so tired that I just turned on my side and slept like a baby till morning. I'm sure that my current position is incorrect because I have often pain in lower spine or headache so I'd like to sleep in a proper position eventually.

Thank you in advance for all your help!

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