There are many ways to find practice guidelines and databases are a great place to start. The following list of databases are known for their excellent access to practice guidelines.
User Guide: Information for accessing JBI Tools for First Time or Existing JBI Users
More training available on Ovid
Alternatively, you can directly go to some journal publications (like JAMA) that are known for their publication of practice guidelines.
Visit a specific professional organization's site to find their sponsored publications. This includes but is not limited to the following:
You can also browse a collection of organizations that provide health information by topic on MedlinePlus.