I test everything, headlines, images, buttons, etc. If you want to know what your users want, you can test your way there. Your users will tell you. Especial

I test everything, headlines, images, buttons, etc. If you want to know what your users want, you can test your way there. Your users will tell you. Especially useful for e-commerce and lead generation sites. If you can increase conversions from 1% to 2%, you've just doubled your revenue. Google website optimizer works well for me.