Once you figure out what to look for and where to look, you still have to worry about the quality of the material you find. A poorly done systematic review is not better than a well done randomized controlled trial. On this page, you will find some resources to help you with appraising the material you find.
More Guides for Critical Appraisal
How to Read a Paper Series
The following series of articles from the Canadian Medical Association Journal, published between 2004 and 2005, include tips for learners of EBM and overcoming challenges for instructors of EBM.