Research, research, research...

For one of my modules this semester, I have to write a literature review and research proposal for any topic of our choosing (basically a practice run for next year's dissertation) and i have spent most of today doing the former piece of work. With the deadline tomorrow afternoon, I have exhausted all literature I can find as well as my mental capacity to write anything else, so I am having to give up for the night and continue in the morning, trying to find another 500 words before 4pm, could be a long day!