Sleeping on the floor day two, and what I will do differently

I attempted sleeping on the floor, and lie awake for 4 hours. I fell asleep after getting into bed, and slept 7 or so hours comfortably. However, now that I have worked all day, will lift weights and do yoga and tai chi likely, and will study and meditate, I may be tired enough to fall asleep on the floor. It is supposed to be very humbling, so I will persist because I am overwhelmingly conceited.