Hello you can use the share button on Hubs to Tweet, or share a link to Facebook, or Blog This to your blog.
I have found using my Blog however, that traffic often goes from HubPages to my Blog.
You can use your blog to ad more information to yor hub and also build links to Hubs which have related content.
Be careful of just copying content to a Hub or Blog that can hurt you, in search engines and readership, no reader wants to go from one site to another for exactly the same information.
You can also add an RSS feed easily to your Hub and Blog, the easiest form is your Widget on your hubpage profile. Just copy the HTML and put it on your Blog.
Link your Blog RSS to your individual hubs by using the RSS Feed Capsule.
Hope these ideas help.