Stu has written, in When "Good Enough" Really is Good Enough...
We are bombarded on a daily basis with perfection. "Get the perrrr-fect career, the perrrr-fact car, the perrrr-fect body"… to the point of paralysis. We get it into our heads that since we'll never be good enough, why should we even try?
Yet think of it this way... if everyone ELSE is thinking this and doing NOTHING, then you just have to do SOMETHING to move ahead. To do that, you just have to realize that good enough really is good enough.
Go there and read Stu's five reasons why he thinks "good enough" really is good enough.