The Research Process - Qualitative Pathway - the downloadable worksheet is exceptional. Step by step on the methodology section. http://www.bcps.org/offices/lis/researchcourse/develop_writing_method_qualitative.html
Looking for a topic for an argument essay, debate, or a speech? The best topic is one that you truly care about, and one that you're prepared to research. You'll have to back up your claim (whichever side you choose) with lots of evidence and support.