Find out the directory which is having high pr(Usually most of people would like to prefer Directory critic & Vmoption for this). Then submit your site information into those site.
I have already done these kind of work.My site has PR4 and now i want to reach PR5 or PR6.So what should I do for this aim.
have you tried blog commenting tactic? make sure that you contribute to a healthy discussion and the blog owner will approve your link
Thanks friends for share.I actually tell you I m doing daily SEO for my site.I am using forum posting,blog commenting and other ways.But I want to share max blogs are no follow.But rather than these techniques there is other way to get high PR backlinks which I am missing....
Do Google and find higher PR directories. Higher PR directory submission will give you what you want.
Why don't you try reciprocal link exchange? I am sure that relevant link exchange with high pr site will be helpful to increase your pr also