Make sure your bedroom is dark.

Proper darkness in the bedroom is important for your sleep – especially in the Nordics where we have several months a year with almost constant sunlight. If you still want a night light in your bedroom, choose one with very low light instead of an LED light. 

WHY IT HELPS:
Because the receptors in our eyes are sensitive to light even when they are closed, sleep can be disrupted by anything from street lights to light from electronic devices or sunlight. By having a completely dark bedroom, you ensure that you are not disturbed and risk waking up unnecessarily.