Declaring a catalogue item to be a featured resource simply involves promoting an item to the front page. The method that you use to accomplish this depends on where you are currently in the site:
Go to "Publishing options" at the bottom of the edit page and select 'Promoted to front page'.
To distinguish between which items are in the 'Featured Resource' section and which ones are in the 'Other Featured Resources' section, go to http://anisa.org.za/faq/faq_categories/how_do_i_add/how_do_i_control_whether_featured_resource_featured_resources_sectio.