High fives come from the family of interactive gestures that are today a part of human interaction. And also a part of being cool. There's an entire science to how you can give the perfect high five, with palms of both the parties meeting in unison. Just to be clear, out of the wide variety out there, we are just talking about the good old way of greeting people by slapping their palm.
All you have to do is focus on the elbow of the person, and not the hand. That's right! If you aim for the elbow instead of the palm, you will squarely hit the palm.
Of course both the parties should be aware of the greeting and both should aim for the other's elbow. That's the pivot point and not the palm.
So the next time you meet a friend slap the palm while aiming for the elbow. You'll never go wrong again.