The proof is the most critical part of any lawsuit. First, it is important to document everything. This includes any examples of discrimination, harassment, or retaliation. The more proof provided, the better your chances of an outcome that is in your favor. Keep a list of names, dates, and details. Make copies of any written correspondence that is evidence of behavior that breaks the law.
Regularly ask to see your personnel file. Your employer is required by law to give you access to this file. Make copies of all the documentation and keep a running list of those documents.