Originally Posted by genevie
One of the factors that affect page rank is the number of back links that you are getting. In order to do that, engaging on the techniques such as blog commenting, forum posting, classified ads, press release, online groups, link wheel, social bookmarking and link exchange helps. Just make sure to create quality of links because Google gives more credit on them.
Be careful with heavy backlinking strategy. Not all backlinks are considered of same weight of importance.
Actually, I am engaged in somewhat of an email discussion with Dimitar
from Daw web hosting blog about this. My overall position on PageRank and backlinks relationship is that a backlink is stronger when it is presented in the form of actual content. For example, if CNet or PCWorld were to post an article and refer to HostingDiscussion.com, that would count more than my forum signature on another web hosting forum.
I don't think a forum signature or blog comment does much nowadays, search engines such as Google are way smarter than that.
Btw, because of recent escalation in forum signature spam and blog commenting spam, a lot of forums that are proactively monitored (and blog owners) are using the "nofollow" link strategy.