First of all, you should better choose a right keywords for your site. It means that your keywords should be competitive enough so that you could have many traffic that will search for your keywords. After selecting, you should concentrate on your link building using your keywords. *Search here for different kinds of link building techniques.
need some tips for how to increase PR 0 to PR 1.... because my problem is that no one even with a PR 2 agrees for a link exchange to my site having a zero PR though my site is very organized, neat n clean, please advice me what to do in a situation like this?
Don't even bother about link exchange. Build links and in about 3 months you will have a nice PR. Another option is using paid link exchange sites like LinkExchanged.com But I would suggest free directory submissions, forum signatures etc to build links.
Do you want to get the first page top 10 positions in Yahoo or to get among the top 10 positions in Yahoo. If the second one is the case then you should focus more on the On Page SEO.
If you want to reach top in Yahoo then try to build as many as possible back links with good PR because Yahoo only considering back links.. The more number of back links you will get the more chances to get top in yahoo..
Just do on page SEO because its help to listing in under 10 and on page is much more good for off page optimization. Doing these all you are listing in under 10 in yahoo search.
A trained SEO must know its targeted keywords for their site then implement the two important factors of SEO On Page and Off Page Optimization, but we must spend only a little time in On Page and focus on creating quality content the link building.
SEO techniques and analysis over your niche can help you top make quick growth and help you to earn traffic through yahoo.