- What is it you want to know?
- Where to look?
- How to find what you are looking for? (Keywords)
Scope of the Literature Review? It depends.
- How many sources?
- What types of sources?
- Citation style?
- Time period? Currency?
- Scholarly vs. Popular Materials?
Throw out a wide net
- Databases and Journals
- Read Read Read
How do you know you are done?
One key factor in knowing you are done is that you keep running into the same articles and materials. With no new information being uncovered you can assume you've exhausted your current search and should modify search terms, or perhaps you have reached a point of exhaustion with the available research.
More information on Writing a Literature Review (UNC)