I am a new user and want to find out information about biodiesel, though, I know I am not looking for someone to talk to but a report on best practices for making your own.  When I search for "biodiesel", the results that appear are grouped and ordered in a way that makes it as obvious and easy as possible to find what i'm looking for. Additionally, there is a more advanced search capability (besides the search box at the top of each page) which lets me specify that in this case i'm looking for things that relate to biodiesel (in another search i might want to specify people or places).

See Amy's suggestion for prioritizing cards - http://wagn.org/file/Search.pdf.pdf