There are tons of article submitting sites. I prefer using EzineArticles.com, ArticleBase.com, And GoArticles.com. These have given me the best results and Google likes to index articles from these sites.
Also, here's another tip. HubPages likes unique content. Write different articles on the same topic and link them back to your HubPages article with hyperlinks (those words within your article that are highlighted and if you click on them they take you to a different page).