I’ve written about Grant Cardone in the past, because he is one of those experts that just seem to make so much sense. Selling is an art form and even the best salespeople need inspiration. Grant (@GrantCardone) is an excellent combination of dynamic and “matter-of-fact.” His selling tips and techniques are pure gold and he is a frequent contributor to Entrepreneur, which is where I found this article on the Ten Biggest Sales Mistakes. Whether you’re selling custom t-shirts or computers, his advice is worth considering. The video doesn’t cover all the mistakes, you need to read the article too!