If you have a good following on facebook and twitter, I suggest using 'Twitterfeed.com'. Input your hubpages rss feed and the hubs should get posted on auto-pilot to both T. and F.B.
The second way I suggest would be to make sure you are using some kind of SEO strategy:
1. Make sure your title is one that is actually being searched.
2. Include themed words and 2, 3 & 4 phrases throughout your article so your hub gets found via several phrases.
3. Write 2 ezine articles, submitted to the top article directories and link back to your hub, BUT..
4. Bookmark those ezines (not the hub!) on Digg & Propeller to bring link juice throughout your work.
These are just a few strategies you could use, good luck.