Remove unnecessary words — Every word existing on your page must be necessary. If you can remove a word without it reducing how enticing, clear, or useful a sentence is, remove it. (Excess verbiage increases the visitor's labor, which triggers their impulse to skim.) A tip: avoid clichés like revolutionary, incredibly powerful, best-ever, and so on. Other products claim these qualities, so visitors are blind to them. It's better to specifically describe how you're different.
Because the pages are part of your overall site architecture, you can use robust site testing tools like Optimizely or VWO to really improve your page/site performance. Unfortunately, while most landing page tools have built-in A/B testing features, they typically lack the options and level of detail available from more dedicated site testing tools.
There’s a better solution: It's not impossible with sales funnel management automation. Set up your system with the response you want, and it will be ready to send it immediately to any interested prospect—even the one who contacts you on Saturday at 3 am. As captured leads pass down the funnel, your sales automation platform can send added personalized emails that are just right for each moment.