I know I'm obviously very late to this discussion, but I developed a template that is similar to this before stumbling on the "Farley File" discussion that is based on law enforcement and intelligence contact sheets. I've redacted some of the stuff to not include close-hold information, but here's what I currently use (note, I also included the evernote file if you just want to download it):
Remember to update tags to reflect the contact’s name, organization, category - i.e., professional, household, etc. - and any other additional details that would be useful for ordering/grouping notes.
For note titles, organize as follows:
individuals - “Last Name, First Name - Organization” i.e., “Doe, Jane - Spacely Sprockets Corporate Audit Investigations”
Organizations - “Institution, Organization, Sub-Section” i.e., “State of Jefferson, Attorney General’s Office, Major Case Squad"
BASIC SOURCE DATA
TELEPHONE NUMBER(S) (identify whether it is a cell/work/home number):
AREAS OF INFLUENCE/INFORMATION:
KNOWN PATTERN OF LIFE:
METHOD (in person/telephone/web/etc.):
Template - Contact 20170107.enex