You need to find the root problem of your condition, in case your insomnia is severe. The problem may be caused by a chemical imbalance in your brain, or due to excessive neural activity. In case these are your problems, you will be encountering sleepless night almost every night and you may find it hard to find a cure. At this time you need to know how to fight insomnia. And in case the cause of your insomnia is epilepsy, menopause, besides arthritis, asthma, as well as heart disease, besides diabetes, make sure that you see a doctor.
In case you have the problem that you are not able to fall asleep as you are so stressed out, it means that only you know how to fight insomnia in this case. It is time for you to take a break. Often, take about 1/2 hour before you sleep in order to do something which you enjoy as it will help you to unwind. This may include things like making a hot chocolate with milk, or sitting down to watch a favourite TV show. Else you may even play a video game on your computer, or go for a quick walk outside. All this should be done during the night just before an exam or an important presentation. Once you are able to bring your mind back to normal, you will not have a great problem in getting back to sleep. This is because your mind has already let go of this problem at hand. If you still find it difficult to know how to fight insomnia, sometime it is wise to take the help of some sleeping pills. But it is important not to become dependent on them for every night. This is because these sleeping pills will tend not to work after some times and you will tend to become more and more dependent onto much stronger drugs.