With that in mind, make sure you design everything for mobile, outwards to tablets, and desktop computers.

That is true when designing your website, but also your emails, blog, videos, ads, and pretty much everything else you are producing and publishing online. If you do not have the skills in house, either find tools to help you, or find help outside.

A great way to outsource your design is to go through 99designs or to find freelancers with platforms such as freelancers.com or Upwork.