Relevancy must be supreme while commenting on other's blogs. Dont just go by the pr of the blog. If you found it worthy, do comment because in long term it is bound to give benefit.
I did once give my honest opinion to one successful blogger in his comment post (and it was approved) and to my surprise, the comment post was #7 for the google keyword search which lead to my website link
Commenting on blogs of high pr ,preferably if belongs to your own subject, will have more importance, others will also do. But best is to have threads and replies in more number of good forums.
what is goog's way, could you tell me in details about this way? So that i can also do something better.
While commenting on blogs, we must keep in mind some important keys that never place your website's link in the pornographic blogs, the blog must be relevant to your websites' theme at where you are going to place your link, the page rank of that blog's inner page must be high.
@ shoukat more back links can never increase your website's page rank, only quality back links can increase your website's page rank.
Socialmonkee.com is nice, you can only add one link a day, but it indexes it in 25 sites for you. Also, adding social media buttons on your site helps when people want to share something you have posted. Also, don't forget to use google feedburner, I get tons of click through that. Delicious, stumbleupon, facebook, reddit, digg, reddit, tecnorari, etc. (definitely submit to stumpleupon, they provide a lot of traffic, but it's sporadic).
If you make daily number of backlinks on high pr blogs, and if they are approved and published it would definitely help in improving pr of your site or blog.
Find some High Page Rank Dofollow Blogs related to your website topic using Google query and leave comments there. These backlinks will going to count quality backlinks to your website. Learn more from here How to Build Backlinks Cheer,
Sorry forget to add. Good contents are very important. You blog represents your thinking & the way you want your life. It is also an important source of income for you. So think with a viewer's perspective. What you will nask from a website when you visit it & what you will get in case you have one.