Adding & Editing Content
Of all the wording that could sum up your content, does your title contain that specific phrase that your target audience might search for? Consider your end user when you fill in the title field by grafting in a relevant search phrase.
Though optional, the web system relies on what's in the Description field to generate meta-description information that search engines use to index web content! The key here is placing relevant search phrases into your description as naturally as you can while keeping things human-readable.
Be sure to use the "Style..." drop-down menu to create proper headings and subheadings (Heading 2, Heading 3, etc.) This ensures that they're encoded in a way that search engines recognize, as weight is given to terms that have a Heading applied.
Getting Your Name Out There
Once you've done all you can on your site, you'll want to try to get other sites (outside of your own) to link to you. The more relevant sites linking to your site, the more prominent it'll rank among competing sites that contain the same search terms.