Smile. A smile is the most memorable feature after first meeting someone.
The right handshake. A proper handshake can convey confidence.
Introductions. Throw in a verbal introduction as you meet with people, even something as basic as "great to meet you".
Speak clearly.
Make eye contact.
Use body language. Most of us instinctively mirror each other's body language. Mirroring body language is a non-verbal way of saying "we have something in common."