Who: Who wrote the article? Are their credentials listed? Who is the intended audience?
What: What are the author(s) trying to say? Can you find the thesis statement?
Where: What kind of publication was the article published in (a scholarly journal, a magazine to educate patients, a popular source for scientific information)? Where was the research completed and who does it impact?
When: Is your article recent? It should have been published within the last six months.
How: How did the author(s) acquire the information? Can the experiments be run again? Can the information be found again?
If you can't think of a good topic, here are a few places to look for ideas: