A Farley File is a diary and aide-mémoire.  The easiest way to construct one is as a computer file arranged by Name.  Each entry should include the contact information (address, telephone number, email, etc.) if appropriate and known.  With the ubiquity of digital cameras a photograph could go in there as well.  The diary part is a running record of information regarding the person: spouse, children, hobbies, likes/dislikes, beliefs, questions, requests for information, & etc. and a record of interaction(s) with the person the Farley File is for.  Also an assessment and comments section could be in there.

A good idea is put people not met but important such as Congressional members, leaders and VIPs of all political parties, major businessmen, personnel within the organization, and so on.  

 

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre