Follow these step to increase your pagerank.
You must own a website or weblog with its unique domain, now click this link
to open the backlink checker in the new window or tab of your internet browser. Then in that window, insert any domain of famous website or weblog, for example, type www.facebook.com and see how much backlinks of Facebook with its Pagerank from each backlinked website or weblog, click them. Put your URL address on each blogs you have clicked, do it as much as you can as long as it allowed and not annoying.
In another way, you can visit any weblog which has guessbook or comment box feature, you may ask for something right there and do not forget to also put your website or weblog URL. Ask to them carefuly, don't do spam or they will hate you and also your website or blog.
For Bloggers, you may do link exchange, you put their blog URL and they will also put your website or weblog URL too. It is very effective method.
After you get a PageRank, keep and hold it by keep posting some articles twice a day, daily, once in two days, or weekly, don't let your website or weblog content obsolete. Keep renewing them. Or visitor will leave and you lose the PageRank quickly.