Ernest Hemingway was one of the greatest writers of all time. I study lots of writing blogs because I think that just about everything that applies to writing applies to photography and vice versa.
My favorite Hemingway quote (watered down for a PG audience) is:
“I write one page of masterpiece to ninety-one pages of crap” Hemingway confided to F. Scott Fitzgerald in 1934. “I try to put the crap in the wastebasket.”
The lesson for photographers is simple. When building your portfolio (or “book” as we used to call it in the old days) throw away 99% of what you think is good and keep only the very best – the masterpieces.
If it worked for Hemingway it will work for you!