Help with using the EBSCOhost interface is available from the Help link at the top right of the EBSCOhost screen.
Once you are in the EBSCOhost Help screen, a detailed guide to the specific database you are searching is available from the bottom of the left hand menu.
While you are searching the databases, you can use the question mark icon to access contextual help relating to the specific aspect of the database that you are using.
EBSCO's online tutorials provide more information about using the EBSCOhost databases.