1. Smile - not always , but in maximum cases.
2. Become genuinely interested in other people- this is necessary.
3. Remember that a person's name you met - when you call him/her with his/her name , he will never forget a person like you.
4. Talk in terms of the other person's interests-but don't be so loud.
5. Be a good listener, encourage others to talk about themselves-...and listen it sincerely.