Unfortunately, gender variant individuals who are pre-transition tend to face higher rates of mental illness and suicide as a result of society's reluctance to fully support them as equals. The top intervention for improving transpersons' health and reducing hardship is a successful transition. Being familiar with concepts like sexuality, gender, sex, and orientation- and understanding the difference between identity and behavior- will help you be a better advocate for the people you love.
Parents and Friends of Lesbians and Gays offers information about gender identity issues and frequently asked questions
Information on medical, hormonal, and surgical services for transpersons
Female to Male International has a lot of information for parents and spouses under "Family Resouces"
Gender Identity and Mental Health 
