I have two websites currently out based on Adsense for income.
One is doing well. It is low competition and got to 1st page in Google pretty easily.
The other isn't, though. It's ranked about 60-70 in Google for a little more competitive keyword. I've spent about $35 for some backlink building from Digitalpoint forums, but many of them seem to be incompetent and provide crappy backlinks that are usually deleted within days.
I have done some backlink building with articles at Ezinearticles for the site and it's helped, but these articles take far too long for me trying to get up first page in Google.
So, I was wondering what are some free pagerank building ways that I can work on by myself?