I read your hubs and I would like to give a few suggestions if you don´t mind (as an answer to your question, of course):
Make your hubs a little longer (800 - 1800) words
Keywords at the beginning, in the middle and at the end of the text
A few photos, possibly a video
Links to your other hubs (always use your hubs for backlinks)
Include RSS feed
Read other people´s hubs on backlinking and SEO!
Welcome once more!