1.) Run a Site Speed Diagnosis

2.) Delete Unused Plugins and Themes

3.) Clean Up Your Media Library

4.) Clean Up Your Database

5.) Remove Render-Blocking Javascript and CSS

6.) Minify CSS, HTML, and JavaScript

7.) Optimize Images

8.) Lazy-Load Long Pages

9.) Limit Comments Per Page

10.) Reduce Redirects

11.) Reduce Post Revisions

12.) Disable Pingbacks and Trackbacks

13.) Run the Latest Version of PHP

14.) Choose a Fast, Lightweight Theme

15.) Use a CDN

16.) Leverage Browser Caching

17.) Move to a Dedicated Server

18.) Consider Your Hosting Infrastructure