Answer:
The easiest way to impress someone is to make them happy. Do this unselfishly and just because you want to see them smile. Try to base what you do on impress others with your self confidence. When you focus on just being yourself, without shame or trying to hide what makes you happy or upset.
Explanation:
I think you really don't need to impress someone intentionally. If you are true person your will impress everyone with your the whole idea behind impressing someone is basically feeding their perception of what you're supposed to be and giving how to impress a person who is not easily impressed?
I hope this is a correct