A very simple trick for faster spacebar clicking is to use middle finger to push the spacebar half way down and then use index finger to press the spacebar button further. This way you can click the spacebar almost twice as fast.

The first and foremost thing you should do to hit the spacebar as quickly as possible is to play the spacebar game to challenge yourself.  With practice, you will be able to press the space bar faster.

The next thing you can try is to shift the fingers if exhausted by hitting the spacebar button continuously. Don’t tap the spacebar clicker with the same finger.

Using a good quality PC Keyboard also gives you a lead over others in clicking the spacebar clicker faster.