Hmm...thats tricky question to get backlinks. It is an open secret that to rank well we need backlinks. But be sure you are doing right otherwise result will be bad.
Better you submit your hubs to social networkig sites, tweet them, bookmark them as many as times ...there are hundreds of bookmarking sites out there.
Go in Google reader and creat a 'ALERT' for your targeted keyword so you will get notification from all web and by participating in discussion you will get a backlink from relevant pages though it is a long and boring process it brings up the good results:-)