There are many factors in our bedrooms that can have an effect on the quality of our sleep.
For instance, temperature really does affect sleep quality. The optimal range is somewhere in the range of 60 to 72 degrees Fahrenheit. To achieve that you could leave the air conditioning on, or you could go the greener route of installing a fan or getting lighter-weight bedding.
Another big factor is that the brain controls your internal clock based on signals received via your eye’s optic nerves. When light is detected, it delays melatonin release, produces cortisol, and keeps you awake. So darkness really is important for healthy sleep. Turn off any electronics, keep your bedroom dark with proper shades, or you could get a sleep mask that covers your eyes.
Your pillow is also an important part of healthy sleep. Back sleepers should look for a thinner pillow, side sleepers should choose for a firm pillow, and stomach sleepers should use a very thin pillow or none at all.