If you were to pick ONE thing to focus on in business, it should be the idea that whatever you're creating is incredibly useful. Everything else is a supporting tactic to showcase the usefulness you're putting out into the world. I'd argue that all the other supporting tactics you CAN use, aren't things you SHOULD use until you've discovered how you or your business can be useful to other people. And speaking of useful, check out FreshBooks if you need help with invoicing, time tracking, tax prep, and much more - freshbooks.com/actionarmy