To achieve this your website needs to be technically sound but of course the content you're inputting yourself also has a big impact. Be sure to keep SEO in mind when updating content or preparing any kind of go-live of new web platforms, websites or webpages.
SEO best-practices
Below you can find a couple of links to SEO best-practices related to content-input.
SEO-optimized images
Images have a very big impact on site speed (and SEO). Make sure all your images are optimized according to SEO best-practices.