Scientific articles--research studies in particular--have the same structure. The text is proceeded by an abstract, which is a summary of the article's main points. Next, there is an introduction, a methods section, a results section, and a discussion section (IMRD).
Step 1: Read the article very quickly
Step 2: Read the article thoroughly
If the article is highly relevant, you'll then want to read it all the way through. Scientific articles tend to be complex, and you may have to read it more than once. Take notes, and consider writing a brief annotation to increase your comprehension even further.
If you want to incorporate a new angle, fresh perspective, or a missing connection in the field:
Reflect:
What does the literature say about your topic?
Are there any competing perspectives on your topic?
What gaps in knowledge around your topic did you find? Was there something you thought you should be able to find but couldn't?
How could your experiment add to the body of research?
Does the article’s conclusion state weaknesses of the study? Does it propose potential areas for future research?
Revise:
Your research question might change a bit or become more refined at this point