Please help. MC is tired mainly because of the lack of sleep - for the whole book. Emphasizing that he is sleepy is very important to justify some of the mistakes he makes, which is the main twist that moves the story forward. Right from the first page, till the end of the novel he is sleepy! I have to remind the readers that he lacks sleep, over and over again. But i am stuck with only the following to show that he is tired [and not using 'sleepy'] and he needs sleep so badly: - He falls asleep whenever he goes into some deep thoughts, - He drinks strong coffee from the cafeteria, but after few minutes he finds himself asleep on the table and someone waking him up. - Eyelids closes involuntarily - His shirt collar stinks of saliva from drooling in the sleep What else he feels when he is that tired? Thanks in advance for all the suggestions.