There are many ways to take notes on your readings while you are working on a literature review. Here's one simple method. Create a document for each article you read and follow a consistent format for your note taking. It only needs be a page in length. Suggested sections are below:
Write this document in your own words so that when you come back to it to incorporate into a larger literature review narrative, you can easily know when to directly cite, when your're paraphrasing and what you're original thoughts are.