Just relax. Assume that this is probably going to be a bad night, you will not sleep much and tomorrow you will be tired. First of all accept that, or you will

Just relax. Assume that this is probably going to be a bad night, you will not sleep much and tomorrow you will be tired. First of all accept that, or you will feel even more anxious. The good part is that tomorrow night you will be tired, so it will be easier to fall sleep. Then, try to do something to distract yourself. It is really boring to spend the night laying on the bed and feeling miserable because you cannot sleep. Grab a book or watch a film, at least you will do something profitable during the night. Finally, at some point, you will fall asleep. It will be probably too late, but at this point there's nothing you can do about that. IMPORTANT: Wake up at your time. You will feel extremely tired, and it will be really hard to wake up; but if you sleep until late, you will be altering your internal clock and next day you won't be able to sleep early neither. If you cannot sleep for several days in a row, probably you should see a doctor. He will be able to help you.