Yeah, there's lots of hubs already about that topic. The basics are the same for HubPages as anywhere else...
-- Determine your niche/audience FIRST.
-- Research keywords for that niche.
-- Write lots of hubs for THAT audience.
-- Include a keyword in your hub's title.
-- Provide useful information that isn't already out there.
-- Network with others in your niche (both writers and readers) on social media.
-- Network with others in your niche via blog and forum comments.
-- Gradually build backlinks, but only from relevant, high-quality sources.
-- Don't quit.
-- Adjust as needed...but don't just stop.
There are few "secrets" out there anymore. We all kind of know already what we gotta do. What trips us up is that we get distracted trying to find shortcuts, then we get discouraged, then we become cynical, then we give up.
But most of the successful people online are successful because they just commit to providing real value to their readers, and they don't quit.
I hope that helps.