So Says Seth Godin.  Maybe he has something up his sleeve — Godin always has.

The little book that says “quit”: Financial News - Yahoo! Finance

The central premise of “The Dip — A Little Book That Teaches You When To Quit” (Portfolio) is that in all walks of life — work, leisure, relationships or business — you will encounter what author Seth Godin calls a dip.

A dip is a “common sinkhole that trips up so many people,” he says. It is the long slog between starting and mastery. It is the difference between the beginner technique and the more useful “expert” approach in, say, skiing or fashion design.

Winners quit fast and quit often and only stick when they find the right dip to conquer, Godin says.