To be an effective CEO you don’t need to know everything about everything, but rather a little about everything. You need to know about accounting, finance, marketing, operations, and all the different types of systems or departments in your business. So you don’t necessarily need to know how to make a spreadsheet in excel, but you need to understand how to read them. You don’t need to know every detail about finance, but you need to know what it takes to go to the bank, what a balance sheet looks like, and to maybe get a loan. I enjoy operations, marketing, numbers, I love looking at spreadsheets, but you can be a really good marketer and not be a successful entrepreneur, or CEO at least, if you don’t know a little bit about everything, so you have to be well-versed in all the major functions in your company and you need to pay attention to every department. A CEO doesn’t need to be the top accountant in the country or the top finance guy around or the top marketer, but he needs to know at least a little bit about all those things to run his company effectively.