5 Mistakes every Website should avoid

1. Having a confusing or counterintuitive site structure. Nothing drives users away faster than a site that forces them to click around aimlessly until they stumble upon the right page. An expert user should be able to get where she wants to be in no more than three clicks. 
2. Making the menu too complicated. Menus are the rough equivalent of a Web site’s spine. You want to keep them clear, straight, and strong. Navigation is normally found running horizontally across the top of a page in a tab-like orientation or stacked vertically along the left side of the page. No funny coding. No funny scripts. 
3. Lapsing into industry jargon. An overabundance of marketing-speak and technical or industry jargon is a very common mistake. Your goal should be striking that balance between efficient search engine optimization and easy-to-read copy.
4. Overpromising, or even under-promising, what you can deliver. A Web site becomes unusable, and thus irrelevant when it tells users that it will do something and then does not do it. That will drive those visitors away. Permanently. 
5. Not closing the sale. If the site doesn’t call the user to some sort of action, whether it be phoning, faxing, e-mailing, or forming an order or at least a question, the user won't be drawn to jump through the hoop.