1: Lie flat. Put your arms flat, relax, adjust your breathing and try to be gentle and long. Inhale, hold your breath, exhale, hold your breath, four isochronous cycles. So you can relax. See breathing in Rozamov's learning method for details.
2: Lie on the right side. Keep the heart up without being squeezed. Curl up slightly like a fetus. Don't press your arms. Taoist health care methods, breathing as slow as possible, not to think about it.
You can also make tea with Schisandra chinensis (don't drink too much before going to bed), order some light incense, carnation, sandalwood and bodhi, and see your personal hobbies!
Don't cover it too thick when you sleep. If your heart is broken, you won't have a good rest.