Before heading off to the databases, it is important to have a search strategy in mind and to understand how that strategy might change with the different databases you search. Key components of excellent searching include:
One strategy for accomplishing items 1 & 2 is the PICO method. By defining each element in the PICO acronym, you can easily create a focused question and generate appropriate keywords. It can also help you to understand how to use search string logic to appropriately combine keywords and concepts into an efficient but complex search.
If you would like assistance in creating an efficient search strategy or workflow, please contact the librarians via medlib@unlv.edu and we'd be happy to schedule a time to meet with you.
There are a number of resources, both free and purchased by the library, that are focused on finding systematic reviews, evidence-based guidelines and clinical trials.
There are thousands of databases that index journals based on subject or topic. The library subscribes to hundreds, but here is a list of some of the most well-known and content-rich databases for the health sciences.