first you will do social bookmarking and social networking. social bookmarking and social networking are best for website promotions and change the content of the page you must keep the more related keywords in the page and submit your page to google bot. post discussions on facebook, twitter, orkut and many social networking sites.
After building links pointing to your site, make sure that you ping them so search engines will crawl the links quickly.
Please specify how your do not understand how to ping when you create the link, Because of poor understanding, please advice? Thanks
Here is the best way to gain PR: 1) Find websites/blogs/authority sites/wiki's that are Do Follow 2) Check their PR if PR is higher then build links.
Credible links from popular relevant sites. My experience is good content results in backlinks. Generate good content and you will be fine
First of all, read articles, write beautiful articles, look for services like Digg, add to our listings. Doing everything first hand, master. Later, when the experience, you will discover ways (different) automation of these processes. Good luck to you.
The most important point for getting a high PR is to get as many relevant high PR inbound links as possible. The more you can get, the higher PR you can achieve.