You can increase your PR if you have the inbound links from the web pages that are having the page rank more than one. The maximum page rank of the web page would give you the maximum chances of increasing the page rank of your web page.
do quality backlinks to your site. and you ll be good to go. Use tools like PR builder or PR storm (use it ur own risk) to build links automatically
Do directories, classifieds and forums of high page and alexa rank, so by doing this you can get a good page rank.