A concise and fabulous guide to writing a literature review; gives clear examples of how to use a synthesis matrix (a literature review grid like we used in class) to pull your sources together. From Florida International University.
Zotero is a free "research assistant" that allows you to "collect, organize, cite, and share" your sources right from a bookmark in your web browser. It will sync data in the cloud and across multiple devices, allowing you to work on your research no matter where you are. It integrates with MS Word and Google Docs to help you create and manage in-text citations and bibliography entries.
Using a chart like this one (easily made in Google Drive or Microsoft Excel) can help you organize your sources.