I don't find one tool to be the most important, as they're equally useful. You just have to utilize every one of these tools to build a successful business. I think it's pretty cool, as you have Ask SC, the forums, the downlines, the uplines, and of course...Mr. Gery Carson himself. So if you really think about it, the tools that SFI has laid out on the table are all important. You just have to figure out how to use those tools to build your business.