I beat tiredness by going to bed at 11-12 each night, and waking up when the sun coming through the window wakes me up - 6:30, 7:30, 8:00 - whatever. But if you have to go somewhere early set an alarm just in case

. The only other thing that makes me tired is extreme boredom. I beat that by either exercising patience or doing something not boring, which then beats the tiredness.