I keep it really simple. I cheat. What I do is use a program called coffee cup web form builder . I create a web form with only a submit button on it. I rename the button to something like "free anti-virus" program & place it on my web site. When some clicks the button it takes them to a free antivirus site like avg free and it emails me that someone pressed the button. People can't resist free stuff.
This might be a bit confusing to you but take a look at my business site
www.4420115.com.
If you want me to make you a button to place on your site. Simply tell me what you want the button to say -- ex. free desktop wallpaper or whatever & give me address of the site you want your visitors to be taken to. It can also simply be a link to another page on your web site. If you want me to build it give me your email address & I will configure the button to send you an email when someone clicks the button .
Or if you want to download the free trial coffee cup web form & tinker with it I can answer any questions you may have.
Good Luck
Paris Geek