Do you have members of your sales organization that specialize? Do they know a particular product or service inside and out? Is there a certain type of deal that they are hunting down? They are doing everything they can to prospect and cultivate new leads. Everyday they may find nuggets of what customers want, what questions they have, what concerns they have. This is powerful information that can be used on your website. These customer insights can help uncover new keywords that could translate into a major deal. So ask your sales team to generate new keywords. No one has a better pulse on your customers.