You may need to refer to them in a follow-up letter or even write to them. Asking for a business card is appropriate. A poker face and arms folded across your chest are not conducive to open conversation. Sit up or stand up straight. Look people in the eye and answer questions directly.
Every situation is different.
A new setting may require different solutions. Remember, there is more than one way to skin a cat. If you smoke, refrain from lighting up while on an interview. When the setting is busi- ness, stick to the subject. Don't ramble or use irrelevant examples.