#4 Stay cool

Image Source: Ryan Hyde
Trying to stay awake while sitting in a warm, stuffy environment will only make it that much easier to doze off. Turn the heat down or the air conditioning up if you can. If you are not in a place where you can do that, try to find the coolest place in the room, like a chilly corner of the room or near an air vent. Feeling a little on the chilly side can definitely help you stay awake and alert.