Last week I wrote about persistence as a key element in achievement. While being persistent is certainly a valuable trait, learning when to persist and when to quit is even more valuable. I have an entire chapter in my book, "Becoming Unstoppable: Tools to Elevate Your Game," dedicated to this very subject. However, let's take a quick look at when quitting can be a good thing. Sure, not finishing a task you originally set out to accomplish may not sit well with many of you: e