Try to avoid sleeping during day by keeping yourself engaged.
Avoid consumption of coffee or tea or alcohol in the evening.
Take a warm bath, keep your sleeping area neat and clean and u can have a cup of warm milk before u sleep.
Avoid television or reading books or using cellphones if u cannot fall asleep.
If u smoke or drink alcohol, it is better avoided
Next Steps
if neither of these measures help, to correct your sleep cycle, medications can be used for a short period of time.
if there is anything else that's troubling you, stress or anxiety or depression, this also can be assessed by the doc you consult.