Use the database in your subject area to find other literature reviews for a model; examine how authors in your discipline have composed their literature reviews.; look for themes or ways to organize your final review.
Check the bibliography of articles you've already read.
Here is a sample literature review from an article, including highlighting and notes on the literature reviews.
ERIC uses the subject headings "State of the Art Reviews" and "Literature Reviews"
Also try adding the phrase "Narrative Review*" (the asterick picks up the plural also) with your subject terms.
In ERIC try this search string
PsycINFO adds "Literature Review" as a METHODOLOGY. Choose this after you do your subject search.