I have been working near enough 20 hour days of late, and it has started to catch up with me. I have believed that I could stay up all night and carry on a normal day with no problems what so ever. For a long time I have believed this and did exactly that. I would work all day and never stop long enough to get tired. I have since realised that it isn't a healthy or good way to live. So I've started to change my ways and put a stop to it.