There are many things that influence the hubscore obviously which I am sure you know that already. So some things I recommend doing that some people forget that play an important role in your hubscore are.
1. Hop some hubs. This is a great way to meet new writes and also give advice to new writers. You can also help weed out the junk that spammers and small businesses put on that only lead to hurting the hubpages name. This alone often keeps my hubscore at least over 75 by itself. This is because it is reading articles, commenting, following writers I like, getting your name out there, getting you followers, and helps traffic all around for you for everyone else that reads that article, and helps hubpages by flagging, voting up, voting down, exc.
2. Do not forget you follow people for a reason make sure you keep up with there work. Again, leave comments, give advice, always be kind though.
3. Look through the 'Answers' section see if you can help someone out. Comment on a question or just post your opinion or advice. Make sure if you have a good question, that some one else might need the answer to as well, then ask it in the same section.
4. Spend a few minutes or hours as much time as you can learning SEO. I cannot go in depth with this as I am still learning it myself although I can tell you it will be your money maker along with number 1. Google, Yahoo, Bing and other search engines will be your money makers more than likely not hubpages community.