There are some times where you quite simply have to wait for better conditions regardless of how desperately you feel otherwise. Like if you're sick, you just have to wait til you get better or not only will you take longer to get better, you will take longer doing crappy substandard work which will suck for longer than if you'd just rested and gotten better and then started doing good enough work XP

Meanwhile there's points where good enough is good enough and other points where I don't see why anyone would wallow in good enough when better can be done.

ps speaking of better I hope that's what you are feeling :)