The Brain Injury Association of America (BIA) provides information and resources for anyone dealing with a brain injury, whether you are the individual who sustained a brain injury, or you are a family member, a caregiver, or even just a friend. The BIA website covers issues ranging from diagnosis and treatment to to what to expect following a brain injury to personal stories from survivors of brain injury. They have a section for professionals, and information about public policy and public awareness of brain injury.
A good place to start with the BIA website: Challenges, Changes, and Choices: A Brain Injury Guide for Families and Caregivers