Insomnia

Last night I could not fall asleep. My mind would not turn off. Sometimes I can just lie in bed for a little while, shifting from stomach to side to stomach, and eventually I'll fall asleep. Last night was not one of those nights. I turned on my lamp and read. Usually reading is the quickest way to make my eyelids heavy, but last night I couldn't get enough of my book. I was awake until 3:30 AM. Tonight, I'm going to try reading an old textbook on teaching children mathematics or something. This is killing me.