There are few tips that can drastically improve your sleeping situation! ( I say from experience)
* Sat you go to bed around 10 pm. Do not drink any more coffee/ coke or anything with caffeine starting at 7 p.m
* Drink natural teas and make use of different fruits that have proven to be good for this matter, such as passion fruit! It is amazing! You can open a passion fruit, pour its contents on a cup, add some water + sugar and drink!
* Turn off your phone, it is sleep time
* Fix your room so it is clean, get rid of lights, noises and anything that might disturb you from falling asleep