You can use following PR sites, these are different IP based sites...

http://pageup-pressrelease-network.com
http://arizona-pressrelease.com
http://atlanta-pressrelease.com
http://austin-pressrelease.com
http://baltimore-pressrelease.com
http://boston-pressrelease.com
http://buffalo-pressrelease.com
http://california-pressrelease.com
http://charleston-pressrelease.com
http://charlotte-pressrelease.com
http://chicago-pressrelease.com
http://cincinnati-pressrelease.com
http://cleveland-pressrelease.com
http://colorado-pressrelease.com
http://columbus-pressrelease.com
http://dallas-pressrelease.com
http://denver-pressrelease.com
http://detroit-pressrelease.com
http://florida-pressrelease.com
http://georgia-pressrelease.com
http://hawaii-pressrelease.com
http://honolulu-pressrelease.com
http://houston-pressrelease.com
http://illinois-pressrelease.com
http://indiana-pressrelease.com
http://indianapolis-pressrelease.com
http://jacksonville-pressrelease.com
http://kansascity-pressrelease.com
http://lasvegas-pressrelease.com
http://losangeles-pressrelease.com
http://maryland-pressrelease.com
http://massachusetts-pressrelease.com
http://memphis-pressrelease.com
http://miami-pressrelease.com
http://michigan-pressrelease.com
http://minneapolis-pressrelease.com
http://minnesota-pressrelease.com
http://nashville-pressrelease.com
http://nevada-pressrelease.com
http://newjersey-pressrelease.com
http://neworleans-pressrelease.com
http://newyork-pressrelease.com
http://newyorkcity-pressrelease.com
http://northcarolina-pressrelease.com
http://ohio-pressrelease.com
http://oklahoma-pressrelease.com
http://orlando-pressrelease.com
http://philadelphia-pressrelease.com
http://pennsylvania-pressrelease.com
http://phoenix-pressrelease.com
http://pittsburgh-pressrelease.com
http://portland--pressrelease.com
http://saltlakecity-pressrelease.com
http://sanantonio-pressrelease.com
http://sandiego-pressrelease.com
http://sanfrancisco-pressrelease.com
http://sanjose-pressrelease.com
http://seattle-pressrelease.com
http://tennessee-pressrelease.com
http://texas-pressrelease.com
http://utah-pressrelease.com
http://virginia-pressrelease.com
http://washington-pressrelease.com
http://washingtondc-pressrelease.com
http://usa-pressrelease.com

In my opinion the best one is forum posting.

As I think of it the forum posting and social bookmarking are comes in top.

Originally Posted by Kacy Lee

You can use following PR sites, these are different IP based sites...

http://pageup-pressrelease-network.com
http://arizona-pressrelease.com
http://atlanta-pressrelease.com
http://austin-pressrelease.com
http://baltimore-pressrelease.com
http://boston-pressrelease.com
http://buffalo-pressrelease.com
http://california-pressrelease.com
http://charleston-pressrelease.com
http://charlotte-pressrelease.com
http://chicago-pressrelease.com
http://cincinnati-pressrelease.com
http://cleveland-pressrelease.com
http://colorado-pressrelease.com
http://columbus-pressrelease.com
http://dallas-pressrelease.com
http://denver-pressrelease.com
http://detroit-pressrelease.com
http://florida-pressrelease.com
http://georgia-pressrelease.com
http://hawaii-pressrelease.com
http://honolulu-pressrelease.com
http://houston-pressrelease.com
http://illinois-pressrelease.com
http://indiana-pressrelease.com
http://indianapolis-pressrelease.com
http://jacksonville-pressrelease.com
http://kansascity-pressrelease.com
http://lasvegas-pressrelease.com
http://losangeles-pressrelease.com
http://maryland-pressrelease.com
http://massachusetts-pressrelease.com
http://memphis-pressrelease.com
http://miami-pressrelease.com
http://michigan-pressrelease.com
http://minneapolis-pressrelease.com
http://minnesota-pressrelease.com
http://nashville-pressrelease.com
http://nevada-pressrelease.com
http://newjersey-pressrelease.com
http://neworleans-pressrelease.com
http://newyork-pressrelease.com
http://newyorkcity-pressrelease.com
http://northcarolina-pressrelease.com
http://ohio-pressrelease.com
http://oklahoma-pressrelease.com
http://orlando-pressrelease.com
http://philadelphia-pressrelease.com
http://pennsylvania-pressrelease.com
http://phoenix-pressrelease.com
http://pittsburgh-pressrelease.com
http://portland--pressrelease.com
http://saltlakecity-pressrelease.com
http://sanantonio-pressrelease.com
http://sandiego-pressrelease.com
http://sanfrancisco-pressrelease.com
http://sanjose-pressrelease.com
http://seattle-pressrelease.com
http://tennessee-pressrelease.com
http://texas-pressrelease.com
http://utah-pressrelease.com
http://virginia-pressrelease.com
http://washington-pressrelease.com
http://washingtondc-pressrelease.com
http://usa-pressrelease.com

Thanks for letting us share, Kacy.

As we know that There are three types of link building. if you exchange two way and three way then you should be give link. i mean to say two way and three way link building means give and take. but one way link building means only take. so, one way link building is good for our site.

There are some way for rank the site on search engine and most effective in that is Social Media and some Do-follow Blog comments and oneway Profile link and that should be on relevant sites.

Originally Posted by wildnettechnologies

Do forum promotion, blog commenting, directory submission, social bookmarking, article submission, guest blogging, link wheel creation, thematic links. These techniques will help you to improve your backlinks for your sites and to increase rankings in SERP.

Press Release submission too.