I tried to get my previous business partner to realize that, but he (like others) feel uncomfortable with the "luck" factor. I'm not because I realize I got lucky and thus have even greater reason to take advantage of it. :)
My new business partner is 100% on board to seeing and taking advantage of luck.
http://www.geekwire.com/2011/popcap-ceo-secrets-building-gre...
Money quote: "Luck is always a factor in business … and the most successful companies actually take advantage of luck"