Review the letters and paperwork your primary physicians have completed. Make sure the letters not only explain your condition, but detail why it limits your ability to work. Social Security needs to know how your medical or mental condition affects your daily life and your ability to work. If your letters do not contain this information, ask your doctor to write an additional letter.
Prepare for the doctor to ask you questions regarding your medical history and the issues surrounding your current medical or mental issues. When asked questions, include how this affects your life and your ability to work. If you are depressed, do not just say you are sad daily, but explain exactly how this affects you. For example, "I cry several times a day. I could never work a full day with others or with customers without having multiple crying spells."
Refuse to lie. Medical examiners are trained to recognize exaggeration. Be honest with your symptoms, experiences and how you are affected.