The saying goes that you don’t know what you don’t know. And when it comes to business, it is even more vital that you are actively looking for those spaces in which you might need to plug knowledge gaps. People who made it big in certain areas, like a legendary marketer or a master social media whizz have gotten there through a mix of hard work and learning. And, you can too.  Here are some areas in which you should look to gather more knowledge than you currently have. It will pay in the long run, it doesn’t matter if you use it or not. It is better to have…