Here is an example. Creating an account in gmail.com. Then go to http://www.google.com/profiles
Then edit your profile, put your link in short bio or url. So you can get a backlink from pr10 website.
Bellow are some high pr website:
http://www.adobe.com PR:9
http://www.aaas.org PR:8
http://www.acm.org PR:8
http://www.altavista.com PR:9
http://www.amazon.com PR:9
http://www.aol.com PR:8
http://www.apache.org PR:9
http://www.apple.com PR:8
http://www.aps.org PR:8
http://www.archive.org PR:8
http://www.arizona.edu PR:8
http://www.arxiv.org PR:8
http://www.asu.edu PR:8
http://www.barnesandnoble.com PR:8
http://www.berkeley.edu PR:9
http://www.blogger.com PR:8
http://www.bloglines.com PR:9
http://www.brown.edu PR:8
http://www.bu.edu PR:8
http://www.cbc.ca PR:8
http://www.cbsnews.com PR:9
http://www.cdc.gov PR:9
http://www.cern.ch PR:8
http://www.cisco.com PR:9
http://www.cmu.edu PR:8
http://www.cnet.com PR:9
http://www.cnrs.fr PR:9
http://www.colorado.edu PR:8
http://www.columbia.edu PR:8
http://www.com.com PR:9
http://www.computer.org PR:8
http://www.cornell.edu PR:9
http://www.creativecommons.org PR:9
http://www.debian.org PR:8
http://www.dhs.gov PR:9
http://www.dmoz.org PR:8
http://www.doi.gov PR:8
http://www.duke.edu PR:8
http://www.eb.com PR:8
http://www.ebay.com PR:8
http://www.economist.com PR:8
http://www.elsevier.com PR:9
http://www.energy.gov PR:9
http://www.energystar.gov PR:8
http://www.epa.gov PR:9
http://www.ercim.org PR:9
http://www.ethz.ch PR:9
http://www.ets.org PR:9
http://www.excite.com PR:8
http://www.fao.org PR:9
http://www.firefox.com PR:9
http://www.flash.com PR:9
http://www.flickr.com PR:9
http://www.freshmeat.net PR:8
http://www.fws.gov PR:8
http://www.gamespot.com PR:9
http://www.gnu.org PR:8
http://www.go.com PR:8
http://www.google.fr PR:8
http://www.grants.gov PR:9
http://www.harvard.edu PR:9
http://www.hotbot.com PR:8
http://www.house.gov PR:9
http://www.hp.com PR:9
http://www.ibm.com PR:8
http://www.ieee.org PR:8
http://www.ietf.org PR:8
http://www.iht.com PR:8
http://www.iie.org PR:8
http://www.imdb.com PR:8
http://www.indiana.edu PR:9
http://www.inria.fr PR:9
http://www.intel.com PR:8
http://www.internet2.edu PR:9
http://www.iom.edu PR:8
http://www.itu.int PR:8
http://www.jalbum.net PR:8
http://www.java.com PR:8
http://www.jhu.edu PR:8
http://www.keio.ac.jp PR:9
http://www.loc.gov PR:9
http://www.lycos.com PR:8
http://www.macromedia.com PR:9
http://www.mapquest.com PR:8
http://www.metacrawler.com PR:8
http://www.microsoft.com PR:9
http://www.mozilla.com PR:9
http://www.mozilla.org PR:9
http://www.msn.com PR:8
http://www.msnbc.com PR:8
http://www.msu.edu PR:8
http://www.mysql.com PR:9
http://www.nap.edu PR:8
http://www.nas.edu PR:8
http://www.nasa.gov PR:9
http://www.nationalacademies.org PR:8
http://www.nature.com PR:9
http://www.netscape.com PR:9
http://www.newsgator.com PR:9
http://www.nih.gov PR:9
http://www.nist.gov PR:8
http://www.noaa.gov PR:9
http://www.nokia.com PR:8
http://www.npr.org PR:9
http://www.nrel.gov PR:8
http://www.nsf.gov PR:9
http://www.nytimes.com PR:9
http://www.oanda.com PR:8
http://www.opensource.org PR:8
http://www.opera.com PR:9
http://www.oracle.com PR:8
http://www.ornl.gov PR:8
http://www.pbs.org PR:8
http://www.perl.com PR:8
http://www.php.net PR:7
http://www.pitt.edu PR:8
http://www.plone.org PR:9
http://www.princeton.edu PR:8
http://www.psu.edu PR:8
http://www.python.org PR:8
http://www.real.com PR:9
http://www.realnetworks.com PR:8
http://www.realplayer.com PR:8
http://www.redhat.com PR:8
http://www.regulations.gov PR:9
http://www.rutgers.edu PR:8
http://www.section508.gov PR:9
http://www.senate.gov PR:9
http://www.si.edu PR:9
http://www.siteground.com PR:9
http://www.slashdot.com PR:9
http://www.slashdot.org PR:9
http://www.sourceforge.net PR:9
http://www.stanford.edu PR:8
http://www.statcounter.com PR:8
http://www.state.gov PR:8
http://www.sun.com PR:9
http://www.times.com PR:9
http://www.truste.org PR:8
http://www.uci.edu PR:8
http://www.uiuc.edu PR:8
http://www.umd.edu PR:8
http://www.umich.edu PR:8
http://www.umn.edu PR:8
http://www.un.org PR:9
http://www.unc.edu PR:8
http://www.unesco.org PR:8
http://www.upenn.edu PR:8
http://www.usc.edu PR:8
http://www.usda.gov PR:9
http://www.usdoj.gov PR:8
http://www.utexas.edu PR:8
http://www.utoronto.ca PR:8
http://www.va.gov PR:9
http://www.verisign.com PR:8
http://www.virginia.edu PR:8
http://www.vlib.org PR:8
http://www.washington.edu PR:8
http://www.webstandards.org PR:9
http://www.whitehouse.gov PR:9
http://www.who.int PR:9
http://www.winzip.com PR:8
http://www.wired.com PR:9
http://www.wisc.edu PR:8
http://www.wordpress.com PR:9
http://www.wordpress.org PR:9
http://www.yahoo.com PR:9
http://www.yahoomail.com PR:9
