SEO is all about optimizing a site or page (or hub) for a target keyword phrase of group of phrases. A single target is the most manageable.
Let's say your target keyword phrase (TKP) is the phrase "blue bumblebee wallpaper"...
1. Get the TKP (blue bumblebee wallpaper) in your Title, Summary Text, and URL.
2. Use the TKP in the text of your hub and as a tag.
3. Create do-follow anchor backlinks (the TKP with the hub as the link).. i.e. create an article on goarticles with a bit of text that says for example "...to learn more about blue bumblebee wallpaper visit..." with 'blue bumblebee wallpaper' being a clickable link to your hub.
Those are the basics. Optimize the page for the TKP, then backlink to the page using the TKP as the anchor.