It's important to understand the science of what people respond to and what draws their attention in terms of visuals, headlines, word choice, placements.
A couple of resources I would point to would be http://www.wordstream.com/blog/ws/2015/06/15/landing-page-inspiration (different strategies, examples of landing pages and what makes them stand out) and this infograph on color - https://blog.kissmetrics.com/color-psychology/?wide=1.

I hope you find them helpful. I do design work if you'd like to set up a call and discuss options.