Your bed should be wide enough and long enough, with the correct degree of firmness to avoid putting pressure on your joints, hips, shoulders and chest. An effective pillow which supports your neck will improve the quality of your sleep.
Your bedroom should be cool – ideally between 14°C and 18°C. It should also be dark, since you are aware of light even with your eyes closed. Light sets off processes within your body which make you wake up.