Choosing a research topic is one of the hardest things ever. There is so much that is interesting, its hard to know where to start. And how do you work out where there is a gap until you know quite a lot about the subject. This stage of research often feels like trying to swim through mud. You don’t feel like you are getting anywhere.
There is lots written on the internet about finding a topic and here are few which I think are useful.
Choosing a topic, Claremont Graduate University Writing Center http://www.cgu.edu/pages/891.asp
Choosing an effective research topic, Kevin Klipfel, Information Literacy Coordinator, California State University www.csuchico.edu/lref/InfoLit/Choosing%20an%20Effective%20Research%20Topic.pptx
Choosing a topic, College of San Mateo Library http://www.smccd.edu/accounts/csmlibrary/tutorials/choosing.html
Choosing a research topic, University of California University Library http://library.ucsc.edu/help/howto/choose-a-research-topic