A thorough review of the literature includes:

• Searching multiple databases
• Using synonyms, related terms, and controlled vocabulary (e.g. MeSH terms/headings, APA Thesaurus, etc.) in addition to your topic keywords
• Searching concepts separately to reveal limiting variables
• Combining concepts strategically to focus results without over-narrowing
• Using database limiters/filters thoughtfully
• Applying inclusion/exclusion criteria as you skim result lists 
• Scheduling a research appointment to brainstorm search options with your Personal Librarian