My son has just spent 12 months with two bits of plastic in his mouth (a plate) - this has taken a lot of grit and perseverance on his part. I am proud. I am not good at sticking at things, unless I am passionate about the thing I am doing. Being good at anything, finishing things, grit - passion and perseverance. While I don't think he was passionate about having two bits of plastic in his mouth, he knew that it was important, and that he would go through with it.
Stick with those that have grit.
Check out this great podcast from Freakonomics
And here is the TED talk on Grit: The power of passion and perseverance.