That was the mantra of my construction company and was even on my logo. The last thing I ever wanted to hear from an employee is "that's good enough". That's telling me that it could be better but they're not willing to try. Those employees didn't last too long.
It is said (and I often live by this) that a Job worth doing, is worth doing well. What does this personally mean to you?
My parents drilled that into my head at a young age. If you do the job thoroughly and in the right way the first time, you need not do it again. If the job is important enough to be considered, than it should be done right. Or, don't bother at all. No cutting corners, no easy way out. If you're going to commit, you need to see it to its end.
Whenever someone at work asks
Me how long a job will take ,
I ask them " do you want it done fast
Or do you want it done rite"
I hate having to redo something or having to call someone back to redo something. If you are going to do something, do it right the first time and no time is wasted redoing it.