Social media helps us extend our family trees. Regardless of location, Facebook or Twitter can connect you with relatives around the world. Web 2.0 and Social Media has given families a powerful tool to extend family lines. For example a Facebook Page could be used to share new discoveries and pool resources. As new relatives are found, distant cousins can be added to the group, and share new information.
Recently the 1940 census was released to the public in digital form and quickly indexed through crowdsourcing. Other records are still not indexed, but available online. For these records opensource tools exist to help sort through these images quickly such as FastFilm. Instead of ordering a microfilm and waiting two weeks or going to a Family History Library, you can download the records for free.