I cannot sleep early at night and cannot wake up early in the morning. I normally sleep at around 2 AM and wake up at 10 AM in the morning. I am also very tensed when I try to sleep, lots of thoughts come to my mind regarding my life, my past, and my future. I think unnecessary things. I also watch TV and use my mobile before sleeping sometimes, but even if I do not use them, I cannot sleep early. Please suggest any exercise or some other method to solve this problem. I do not want to take any medicines.