It's important to have a hot or interesting topic or item you are writing about. The second important thing is to have lots of strong keywords that will bump it up in the rankings for search engines. Make sure your content is unique and fresh, and promote your hubs by writing articles (ezine.com) and post it on sites like digg.com and stumbleupon.com
I hope this has helped a little! :)
Check out my hub for an example:
It is number 3 on the 1st page of google. Have a good one!