You can also add custom structured data information / rich snippets to your contents. This helps search engines to give users a better preview of your contents.
For example a recipe. Check this site with Google!
A clean url structure is important for every website. Use narrative urls, which have the post- and category-name included.
But please avoid too long and spammy urls. For example, if you have a blog category called “SEO Communication”, name the permalink only “communication” or “seo”.
Changing the url structure of an existing website often means that you have to redirect all old links to the new ones. This can be really annoying. For this we developed our Suite, where you can redirect links in 3 clicks.