I bought "The Ultimate Small Business Guide" and it was a very useful book during my first year in business. Lots of ideas, things I might have overlooked, detail-oriented stuff.
I have an MBA also. I found it was more of a bigger picture degree. Yes, you learn about accounting, finance, economices, marketing, and mgmt... but nothing about sitting down and running your own thing (although that class was offerred).
IMO, the biggest advantage of the MBA was seeing sustainable competitive advantages. Three years afer graduation, I still walk into any room and automatically just smell a few opportunities. I talk to someone about their job - they can be a roofer, signmaker, mechanic - and my mind automatically makes connections for opportunities I can find in introducing them to someone, or some joint project.
It teaches you to smell opportunities, simply put.
You dont need to have an mba to learn all of that, just study business & economy. As for the mba, i wanted to go for one in usa, had (and maybe i still got it!) the chance and money to 2 of your finest uni's, but at the same time i was offered to visit china, and well, 4 years later im still thinking about the mba while i see dozens of chinese stuff arriving in 40 hc containers i buy every month

Luck? Good for business? Im not sure but i know theres god protecting me, because i give credit straight from my pockets just like if i were a jew lending money to my customers haha and so far, none of them has failed (thanks god for equifax and all the companies willing to give you people's credit info).
On a final note, internet is pretty important in the success of a business these days, the cost of contacting potential customers is just the cost of having a broadband connection.