While it's important to approach your initial research with an open mind, make sure you organize what you find into a coherent set of notes that is relevant to your assignment.
It is at this stage that you should start an outline, sorting your findings into a few key themes or sub-topic areas that will support your central argument.
"Developing an Outline", Purdue OWL
Once you've scratched the surface and learned more about the vocabulary, history, controversy and sources that are important in a discussion of your topic, it's time to:
Have you tried mind-mapping?
Mind-mapping is a brainstorming technique that can help you pull all your thoughts together and get them down on paper in concrete form. A good mind-map can be the basis for an great outline. It can also tap into sub-conscious areas of your brain and facilitate the synthesis of the information you've absorbed from your initial research.