When visitors come to your website, they want to be able to find information fast, to have an enjoyable experience, and to have some interaction with your site. You need to make sure that every page of your website has some interaction on it that requests a visitor to take an action that you desire. For example: Call Today, Request a Quote, Email Now, etc. EVERY PAGE!
Remember, the goal of your calls to action are to help the visitor have some interaction with your site and your company.
Go analyze your current website for a call to action on every page and determine if it is successful or not.