By using Evidence Based Practice you are aiming to provide the most effective available best practice care to improve your patient outcomes.
The evidence by itself does not make the decision but it can help support your patient care process
EBP can be used at an institutional level to inform decisions for things like practice guidelines, while individual clinicians can use EBP to make informed decisions for specific patient care
Evidence based practice is the conscientious, explicit, and judicious use of current best evidence in making decisions about the care of individual patients. The practice of evidence based medicine means integrating individual clinical expertise with the best available external clinical evidence from systematic research
The complete practice of EBM comprises of 5 steps:
Constructing a well-built clinical question can lead directly to a well-built search strategy.
When you are unsure where to start PICO is a good guide to help you break down your clinical question into key concepts to develop your search strategy. Your PICO should help you choose keywords and key phrases for your search. More info...
You can also consider alternatives to PICO. including SPIDER, COPES, ECLIPSE, PIPOH, PECODR etc) based on field of study (eg: medicine, OT, social work, speech pathology, oncology etc).
Kloda LA., Bartlett JC (2014) Formulating Answerable Questions: Question Negotiation in Evidence-based Practice. Journal of the Canadian Health Libraries Association / Journal De L’Association Des Bibliothèques De La Santé Du Canada, 34(2), 55-60.
The library has a wide range of print books, eBooks, and eJournals about Evidence Based Practice:
Resources for searching for evidence based literature
Literature that is trustworthy has been appraised for their validity (truth, or reliability in results) and applicability ( that is usefulness in clinical practice). Not every research article published has high levels of validity and applicability so looking for a few things within the article itself can help you determine if the article is suitable for use as a source.
Hierarchy of research evidence 
Joanna Briggs Institute has developed some which contains checklists to critically appraise the different studies and reviews
. Sackett, D., Rosenberg, W., Gray, J., et al. (1996). Evidence based medicine: what it is and what it isn't: it's about integrating individual clinical expertise and the best external evidence. BMJ, 312, 71-72. doi: http://dx.doi.org/10.1136/bmj.312.7023.71
. Straus, S., Glasziou, P., Richardson, W., & Haynes, R. (2019). Evidence-based medicine: how to practice and teach it (5th ed.). Edinburgh: Elsevier
. EBM Pyramid and EBM Page Generator, copyright 2006 Trustees of Dartmouth College and Yale University. All Rights Reserved. Produced by Jan Glover, David Izzo, Karen Odato and Lei Wang.