A while back, I read Launch by Jeff Walker. It’s a good book on online business, and I learned a lot from it. But there is an interesting statement there that I’d like to explore here. In the book, the author stated that the most important concept in business for him is “opportunity cost.” It means that whenever you take an opportunity, you are giving up another opportunity. This is a fact that many people overlook—but being aware of it will help you make good decisions. I believe that it’s an important concept not just in business, but also in life in general. While making decisions, always keep opportunity cost in mind.