The whole key to a high Google PageRank is to be getting incoming hits. Sites that get lots of hits in, usually have a high PageRank, or will be receiving one in due time.
To receive incoming hits, you should have several backlinks. We recommend finding as many FREE advertisement programs for your site, and signing up. If you have money, and would like to go further, then go ahead and find some good priced PAID advertisement programs.
Text Link Ads is a place where publisher and advertiser meet each other. By text links on related websites, which will definitely increase your PageRank, by all of the incoming hits, and because they provide direct links to your site.
Another key tip is to make your site comply with Search Engines. If you have neat and tidy Web Addresses, more pages should be indexed in search engines, which will mean a higher PageRank from incoming hits off of searches, and from direct links to your site.
The way this whole "Direct Link" scheme works is simple. If a link directly to your site is placed on another site with a high PageRank, even if only for a short period of time (such as a week), your site will "steal" some of their PR. They wont lose any PR by your link being there, but you will definitely gain it. Keep in mind, the PR gain could take several months.