The way a bedroom is arranged affects sleep quality in measurable ways. Sleep research has documented the effects of light, temperature, noise, and visual stimulation on sleep architecture, and the principles that produce better sleep mostly align with what traditional design wisdom (including feng shui) recommends - though for different reasons. You do not need to adopt a particular framework to benefit from the underlying observations. Here are the principles that have actual evidence behind them.
Bed Position Relative to the Door
Sleeping in a position where you cannot see the bedroom door from the bed is associated with poorer sleep quality in some studies, likely because of a subconscious heightened-vigilance response. The classical recommendation - bed positioned so you can see the door without facing it directly - has a basis in this sensory awareness. The practical version is that the bed should not be placed with the head facing the door wall (so you wake up if someone enters) and should not be tucked into a corner where the door is behind you. A bed positioned against a wall perpendicular to the door wall works in most rooms.
Light From Windows
The bed should not be positioned where morning sun hits the face directly through a window without curtains. This is one of the most overlooked causes of disrupted sleep in the early morning hours. East-facing windows are particularly disruptive because the sunrise hits the eyes during light sleep stages when you are most easily woken. Either reposition the bed to avoid the direct path of morning light, or invest in blackout curtains. The brain's circadian system responds to dawn light by suppressing melatonin and triggering wakefulness - useful when you want to wake up, disruptive when you have another 90 minutes of sleep available.
Electronics and Screens
The bedroom contains too many screens in most modern households. The TV across from the bed, the phone on the nightstand, the tablet, the laptop. Each is a source of blue light, notification interruptions, and the kind of stimulating content that delays sleep onset. The most measurable improvement to bedroom sleep environment is removing or covering screens at night. A TV is the most disruptive single item: studies of sleep quality consistently show that bedrooms with televisions produce worse sleep, regardless of whether the TV is on during sleep time. The visual presence and the temptation it represents both contribute.
Clutter and the Visual Environment
A cluttered bedroom is more difficult to relax in than a clean one - this is intuitive and supported by sleep research. The brain processes visual environment continuously, and a high-stimulus environment with many objects to track keeps the nervous system slightly more alert than a low-stimulus environment. This does not require minimalism, but it does support keeping the bedroom relatively clear of work materials, exercise equipment used for non-bedroom purposes, and visible piles of unfinished tasks. The bedroom that produces the best sleep is the one that signals 'sleep happens here' through what is and is not visible.
