I usually go to bed at 11, but at 9 today my body AND mind began to slow down. Its been an hour since I began to notice the sluggishness, so I turned to DV to try to stimulate my mind. Anyway, now I'm wondering how tired is TOO tired to SP. Given that if you are not tired enough, your body will not fall asleep; I'd assume that if you are too tired then your mind would fall asleep with your body. SO! How tired is too tired?