Official documents can contain important clues to aid you in your search, including background and medical information. Take heed, though, because information in these documents is often missing and can be inaccurate. It can take a long time to receive them so get request in as quickly as you can.
Types of official information you should try to obtain include your:
What information you have access to and where to obtain it will vary by state, but the following resources can help
Additionally, join the DNAAdoption.org Google Group to find out about off-line sources, open counties, and friendly judges who can facilitate access to documents. These might provide a short cut or a key piece of information in your search.