For in-depth literature searching:
It often helps to frame your research topic as a question; consider the who, what, when, where and how or how much.
Identify each major concept of your question. You can use these concepts to forumulate your search strategy.
For each concept, consider the most specific terms or key words that you could use to describe that concept. Each of these strings then becomes a single search statement.
A literature review is a survey of current (you determine time frame) literature relating to a particular issue, problem, theory, etc. The review involves a comprehensive search of all of the known/findable scholarly literature related to the issue or topic. The written review provides a summary of this literature and can be a publication in its own right, or may be part of a larger academic research publication.
Refine your research question based on what you have learned
Conduct a comprehensive review of the literature using appropriate databases
Review/evaluate/analyze results
For more about searching, see: Literature Search - Search Tips
Once you have a set of search results that are ready to browse/review, change the display format so that you see the abstracts and other details as you go. Most databases will have a way to do this.
PubMed - Change the "Display Options" Format to Abstract (top right of results page)
Scopus - Select "Show all abstracts" (top right of results page)
Check the box next to articles of interest and save them as you go.
PubMed - "Send to" Clipboard; the Clipboard will hold your selections for up to 8 hours.
Scopus - "Save to list"; you will be prompted to select a list or create a new one.
Use the best of your results - the "spot on" or most relevant publications to grow your results by looking at "Cited by" literature and "Related by" literature
PubMed - "Similar articles" and "Cited by" link appear below the citation abstract.
Scopus -" Cited by" and "Related documents" appear on the right side of the article details.
Once you have finished searching, you can save, export or email selections as needed;