Some useful reference materials and sites details on preparing international English exam can be found here.
Well anything could be seen as night-mares if our mind is negative. It is natural to get scared or feel difficult on preparation of any new things especially exams which are in nonnative languages. But there are ways to come out from any initial fears in any exams if we know how to approach them. Correct ways of preparation and exams tips are very much useful to take any exam lightly and to score high. However, it is important to study what is required to be studied for any exams, but knowing the tricks and tips will make anyone to prepare anything easily and do well at exams to archive the results as they desire.
Some of the valuable information is shared here for prospective candidates.