Sleep some time not comes because of your daily activities such as working more hours on Computer or phone etc...

In night time don't spend more time with computer or phone.because these things will emit  radiation more and it  will affect you eye.

Simple tips for sleep faster:

1.Breath with your mind.
2.Chill out.
3.Trick your brain.
4.Daydream with purpose.
5.Eat carbs at night.
6.dont think about anything.thing only of relaxation