i want to increase pr of my sites, i have started links exchange, directory submission but from last 2 months no change in pr it's n/a please help me
Buddy just get 2-3 quality link exchanges from quality site having pr 5-6 n Bang!! wait for next pr update. you will get ur PR
I strongly suggest you read the Search Engine Optimization FAQ from SitePoint, as well as Chris Beasley's SEO Guide.
Try building one way backlinks. Get back links from relevant + high PR pages. You can write articles and submit them to article directories in order to get one way back links.
Don't worry so much about pr just concentrate on getting traffic. What gives you higher pr like everyone else said are good quality one way backlinks. Try to get links from sites with the same niche.
not true. google doesn't follow any fixed interval to do PR updates. one update might be in 3 months and the next one could be in month and half @ OP, its only 2 months. give it a little more time and you will see some change soon. keep building backlinks
Write 5 articles then submit them to hundreds of article directories. And wait... page rank of your site will be increased within 3 months.