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11. hold your breath for a stronger reduction
The value of breathing exercise is difficult to overestimate the press - as well as in the training of any other muscle group. Holding the breath at the end of the concentric (contraction) phase increases intra-abdominal pressure, and you get the advantage in strength compared with an exhalation to the end of each repetition. Exhale only towards the end of the entire range of motion. And, of course, inhale on the eccentric (stretch the abdominal muscles) phase.
12. Learn to ignore the burning
Workout does not require any special psychological techniques. Just bear! When the muscles are burning in the fire, continue to work! I do not care how you actively support your friends, at this moment you are fighting only with yourself. Get willpower.