You can use General Settings to make libraries appear on the Quick Launch.
You can configure a library to save all versions of a document when changes are made.
You can require approval before documents in the library appear to other users by using an approval workflow process.
Views use document metadata to sort, filter, or group information, so make sure you have the right columns on your library to sort, filter, and group effectively.
You can secure a document library by either granting additional permissions or restricting permissions to others.