Realize that services often have their own terminology, jargon and abbreviations. Look for glossaries or dictionaries. Some sites will provide a definition when you hover over a word, others have a specific sub-page, or section at the bottom of a page.
Familiarize yourself with the structure of the site. Look for a site map, headings, subheadings and breadcrumbs.
Use advanced search whenever possible. If an advanced search option is not available, experiment in the standard search box with limiters, AND, OR or NOT, quotation marks etc.,
Minimize information overload by making your search as simple and specific as possible.
Information in The Factbook is collected from – and coordinated with – a wide variety of US Government agencies, as well as from hundreds of other published sources.