CINAHL, Medline with Full-Text, and Health Source Nursing/Academic are some of the best resources for retrieveing evidence-based practice nursing articles.
They are all EBSCO databases which means that all three may be searched simultaneously. There are advantages and disadvantages to doing it this way. Use the dropdown menu under the FINDING ARTICLES tab and chose CINAHL to learn more.
The dropdown tab also has instructions for additional recommended databases.
Also see the Research Databases by Subject list for Nursing for more choices.