In most Asian cultures, "13" is considered a Lucky Number. I stretched my luck today, when I decided to rebuild the deck on my riding mower....it had a bad spindle, and one of the belt pulleys was bent, and chewing up the belt. With the big fan going full blast in my workshop, I was able to get it tore down and rebuilt in about 4 hours....and probably sweated off 3 pounds. "Luck", for me, is usually the result of careful planning.