What kind of tip is looking at your elbow? Is that a joke in the same vein as "I will give you 100 dollars if you lick your elbow" or " 'knock knock.' 'who's there?' ...."? No, it is the bonafide way to get a perfect high five, every time.
Here's the trick:
1. Establish a partner
2. Make eye contact and raise your hand in a universal sign of an "up top" high five
3. Shift your gaze to your partners elbow, and make sure he or she is looking at yours.
a. This can be done by a silent affirmation or a rabble-rousing shout of "The Elbow! The Elbow! Look at the Elbow!
4. Bring your hands together with similar velocities.
Upon doing this, you should hear a resounding and satisfying smack. (Or pop. I am having difficulty correctly identifying the most apt onomatopoeia.) There should also be a moderate to severe tingling feeling following the sound.
That, dear friends, is how to give a proper high five the first time, every time.
PS If you are consuming mature beverages, please account for that and adjust the focus of your gaze accordingly.