Whenever I write a hub I post a link to it on my website along with several other networking sites like Linkedin, Facebook and Twitter. I have found that when I post links to my hubs it helps to bring exposure to them and the accounts where I have posted them.
I also agree with other suggestions about contributing to forums, participating in questions only when it is a topic in which you are interested. Answers you provide must also be quality answers to the questions. This may help to raise your profie score and as it does you gain more recognition for the topics on which you write.
I also agree you should search out other hubbers for the topics in which you have an interest and look at the hubbers that post to them. If you like their writing click to follow them. This will also gain exposure for yourself and help to bring opportunities to add comments to the hubbers you follow.