It Happens over and over again, you catch the genealogy bug and you are itching to get started. In the rush to get started, you add people to your tree, but you forget to add source information. Ideally every single person in your tree will have at least one source record, indicating where you got the information on the person. Dates of birth, dates of death, marriage, Census information all should have source information attached. Adding an individual to your tree without adding the information about where you learned about the individual weakens the credibility of your data.