You start to think, well of course, had I done so-and-so yesterday, had I done, and I've missed on so- and-so, so you sort of , review the day for a couple of hours, and then it gets to about four o'clock and now you're thinking, Oh my God, I'm at the accountants the next day, I'll be so tired, I'll be you know, and it's too late to do anything about it now, so now you're having a bad day the next day as well because you've got yourself all stewed up about that.