A reasonable starting point requires some foundation in fact. Be cautious about putting too much trust in undocumented family traditions, including those written down and even published or appearing online. Any written material or books that do not provide source notes and a bibliography of all the sources used for a given time period should be treated as tradition, not fact. The internet has the advantage of providing digitized reproductions of original documents for the stay-at-home researcher. Unfortunately, the far more numerous online family trees are rarely documented. Use such only as a possible guide for further research, but not as proof.
However, traditions passed on by persons from within the familyís living memory over four generations are usually correct as far as names and relationships. The least reliable information based on family memory concerns DATES, AGES and PLACES. The statements of the 19th-century immigrant about his/her county of birth or origin are probably factual, but the same can not be said for the town or parish of birth. An immigrant will typically give the name of the largest place in the county rather than the nearby, relatively unknown place of origin. The smaller place name may become warped as it is passed down over several generations unfamiliar with local geography. Further guidance on identifying places is outlined under geographic location.
The goal of documentation is to start with the date closest in time to the researcher of any ancestor and work backwards from there. First document the selected personís death date then the marriage and birth dates. Keep in mind that one of the important roles of documentation is to support linkages to other persons and places from generation to generation. Ages at the time of the event and any witnesses are vital to this process. What may appear to be an unnecessary document may be the one that provides clues to verify connections or determine what source to search next. Do not isolate an ancestor from the context of family, time and place. Rather, complete each family group by finding proof of the deaths or burials, marriage, and births or christenings of any set of parents in your direct lines and at least find the births or christenings of all of their children. It is possible to work on more than one family group at a time.
How do you know when a family group is complete? Examine the family group closely by asking the following questions. More research is necessary if any question is unanswered.