This article from the journal Practical Assessment, Research & Evaluation is a great resource. It gives a framework for understanding the scope and demands of the lit review process.

Randolph, Justus (2009). A Guide to Writing the Dissertation Literature Review.
Practical Assessment, Research & Evaluation, 14(13).
Available online: http://pareonline.net/getvn.asp?v=14&n=13.

For an excellent guide to literature reviews and how to write them, see the Boston College University Libraries guide:

http://libguides.bc.edu/litreview

Phase 1: Scope of Review

Phase 2: Finding Information

Phase 3: Recording Information

Phase 4: Evaluating Information

Phase 5: Organizing the Review

Phase 6: Writing the Review

Phase 7: Bibliography