"The meaning of 'suspending from a beam' is this: find a rope, tie one end to your hair, and the other to a horizontal beam in the temple. When fatigue and drowsiness from reading set in, and you start nodding off, your head will inevitably begin to droop."
At that moment, the rope hanging from the beam will pull on your hair and cause pain to your scalp, which will wake you up due to the brief agony. The drowsiness will disappear, and then you can continue reading.
However, I feel this method would be useless for a Giant Dragon like you. If possible, I would recommend you tie a steel brush to your forehead, with its dense bristles made of special materials.
It should be capable of penetrating your defense. That way, when you doze off and your head collapses onto the desk, the steel brush's thousands of silver needles will prick your forehead, that pain... tsk... just thinking about it gives one the shivers."
"!!!"
