Writing Hubs: So I'll say this again the top three things you need to have on a hub. No some much on the hubs alone, but also outside of hubpages.

--Links: no links people won't find it or won't try to find it. You need link to encourage traffic to move between your hubs, or to your hubs as the case may be.  When you are creating links you will need to think of places that you can link to your work from outside to increase traffic.

Some of these sites are social networking sites, such as Stumble upon, Digg Facebook, and many others.  Also use smaller sites such as She Told Me, or Redgage to get some traffic to your work.  It is important to add links.  It is also important to be active on these sites to maximizethe traffic and money benefit you get from them.  Also, use the power of the article directories since many of these links are do-follow, but do not spam these sites.

--Interactivity: As in people comment you comment back. You go to others hubs and comment there, you write your heart out. Add pols and links, and some good keywords, and answer any questions, and comment back on their hubs that you've answered them. The most important is to be interactive on your own hubs.

Making money happens indirectly with interactivity your hubs will get indexed by Google a lot faster since your name will be found on other sites, and that means your profile will be found easily.  Again this is a slow method to making money but it is important in terms of visibility.

-- Time: traffic comes in time and with it so does your money. Allow this to happen, and understand one thing it is up to your to get the traffic, not hubpages, and the type of traffic matters. Keep writing, and never ever quit.

The more time you give your business, and the more you actually work at improving your links and your interacting without spamming the community the better your hubs will do over time.  It is important to provide quality hubs to your readers, and they are your future traffic.