This website (though specificaly dealing with gun parts) has enlightened me a bit about how to properly use files:
http://members.aol.com/illinewek/faqs/metalwork.htm
If any other member has a better tutorial, and perhaps a list of files with a description of what to use them for to create what kind of shape, and maybe some extra details on how to use them, then by all means post it here.
Information on how to create perfect geometry and mirror finishes on homemade picks should be made more available, and im sure there are knowledgable people who can contribute. *eyes raimundo*
