Business owners make a lot of mistakes, especially first-timers—I'm one, and I know I have. But some entrepreneurs' entire businesses are based on helping others start their own. And since those experts interact with hundreds and even thousands of first-time entrepreneurs each week, they have a wider view than most of the types of errors new business owners keep making as we head toward 2017. These are a few of the most common they've seen over and over again in the past year.
