Purchase blinds that are 1 2 in 1 3 cm or so smaller than the width of your window but long enough to cover the entire window.
Block light around door.
Take 30 minutes and replace the weather stripping and door sweeps around your steel entry doors.
Focus on blocking light and sound first covering windows masking and absorbing noises and blocking air leaks from around windows or doors.
You can also purchase room darkening curtains and just hang them over the door these curtains are made of a kind of fabric that blocks light people who work at night and sleep during the day purchase them.
Blackout curtains or shades.
Move it up or down until the door closes smoothly with no light seeping through.
With heating costs going through the roof here s an easy way to keep heat from slipping out your doors too.
Roller shades naturally have large gaps to the sides of the fabric so these light blocking strips are the perfect solution for maximum light control.
I found that by blocking the light coming from under the door helped a lot with sleep.
Adjust the door threshold with a no.
Install blackout blinds that are mounted to your windows.
Visit your local home goods store for blackout blinds which help prevent any light from entering the room.
Cut a new length of stripping to fit into the groove and either nail it or stick it.
Install the blinds before adding anything else to your window like curtains.
You can see by this photo that the foyer has a lot of light and the bedrooms are right off of it.
Check out how to make your own french inspired boxy door draft or light blocker.
If you are seeing light through exterior doors you may need to simply replace the worn weather stripping.