Almost every company you’ll come in contact with nowadays has a website, and unfortunately, many of them feature disastrous mistakes that impede their marketing efforts. Take a poorly designed website, for instance. What's your perception of the company? Are you likely to buy something from them? Probably not, I’d bet. Moz founder and marketing guru Rand Fishkin further describes how ugly websites can hurt a brand’s marketing power. On CEOs and bad-looking websites, he says: “Much like parents, it's often the case that a CEO or a CMO or VP of marketing or a business owner . . . they look at their website and they go, ‘Oh, it's so beautiful. It's amazing. It's just what I wanted. It's perfect.’ They can rationalize that even while looking at just a junky, horrifying piece of crap.” Bottom line: Don’t let senseless design mistakes destroy your brand’s reputation and marketing power. Here are 10 of the worst ones to make…and how to fix them: