It is important that you know exactly what you are researching. If a topic is too general, you won't get real answers. The more specific you are, the better your research will be. Use mind mapping to develop your topic. Here are some great mind mapping tools
What do you do if your topic is too narrow? Get a little bit broader with location, dates and similar information. Your job is to take the broader research and decide if it is connected to your narrower topic.
MLA (Modern Language Association) Style is primarily used for the humanities - English, philosophy, music, religion - but can also be used in other subjects.