Here we have 60 DoFollow Social Bookmarking Websites to use for the benefit of your SEO campaign. The list is ranked by PageRank.
1 http://slashdot.org (PR9)
2 http://digg.com (PR8)
3 http://technorati.com (PR8) (Only Blogs)
4 – http://furl.net (PR7)
5 http://backflip.com (PR7)
6 http://hugg.com (PR7)
7 http://mixx.com (PR7)
8 http://ma.gnolia.com (PR7)
9 http://connotea.org (PR7)
10 http://mystuff.ask.com (PR7)
11 [...]

Here is a huge list of DoFollow Blogs. Remember to not spam…you will gain more by posting relevant comments/questions.
huge dofollow blog list I found from PR Guide and here is the dofollow list blogs:
http://www.technitus.com/
http://chillimovies.blogspot.com/
http://chillimusic.blogspot.com/
http://chillitechnology.blogspot.com/
http://www.scratch99.com/
http://blog.vinceliu.com/
http://www.ericbramlett.com/blog/
http://www.ulove-tech.com/
http://www.themadhat.com/
http://www.jakobdk.com/
http://www.feelingflirty.com/
http://www.howtowakeupearly.com/
http://menstrualpoetry.com/
http://www.deardrmoz.com/
http://www.triathlontraining.us/
http://www.reviewerofsites.com/
http://www.vandelaydesign.com/blog/
http://www.londonerlife.com/
http://stylemeltdown.com/
http://www.davidpaulrobinson.com/
http://www.wibbly.net/
http://www.neomeme.net/
http://womanstartyourbusinessnow.com/
http://sunlightflavour.net/
http://yourwebsiteprofit.blogspot.com/
http://poeartica.blogspot.com/
http://www.joebartender.com/
http://www.thedailyfuzz.com/
http://bowerbirdbeads.blogspot.com/
http://www.ebayhabit.com/
http://www.thatedeguy.com/
http://savingmoney.iblogger.org/
http://antiguawebsolutions.com/myblog/
http://www.toptut.com/darklight/
http://distressedderma.com/
http://www.webd360.com/blog/
http://www.newsnotion.com/
http://www.digitalburn.org/
http://onemansgoal.com/
http://www.nice4rice.com/
http://laketrees.blogspot.com/
http://mariaflorea.blogspot.com/
http://www.lifeintherough.com/
http://sandossu.com/
http://www.melovillareal.com/
http://lakbaypilipinas.com/blog/
http://www.zenzoomie.com/
http://www.erikkarey.com/
http://jakeldaily.com/
http://www.johncow.com/
http://bothmadandgenius.blogspot.com/
http://www.thehappyrock.com/
http://netjourney.us/
http://www.pentrunoi.net/
http://marketingasolicitor.com/
http://www.makemoney123.net/
http://www.mosesedwardmilesiii.com/blog
http://fruityoaty.com/
http://www.pilotjohn.com/
http://www.mrgpt.com/
http://www.mikesquarter.com/
http://www.salatti.net/
http://bloggersjourney.com/
http://www.amorphism.net/
http://www.hundreddayheadstart.com/
http://health.hundreddayheadstart.com/
http://www.floridasundog.com/
http://www.thedietdiary.com/blog/
http://www.thedietdiary.com/diet_blog/
http://money.bigbucksblogger.com/
http://www.thebeginning.co.uk/
http://jadehat.com/
http://profit-line.blogspot.com/
http://www.hobo-web.co.uk/seo-blog/
http://www.digitaluktv.com/
http://fuery.com/
http://blog.beyondthepod.com/
http://www.realitywired.com/
http://www.brilliantcheers.co.uk/
http://blog.achille.name/
http://onthewebed.com/
http://chrishoyt.com/
http://julieannebonner.com/
http://linkitforme.com/blog
http://www.bhatt.id.au/blog/
http://blogthatoutside.com/
http://www.tobsy.de/
http://www.nowg.net/
http://www.kellycho.com/
http://sweetagring.com/
http://www.layercake.net/
http://eriksvend.com/
http://pajamaprofessional.com/
http://www.hem.com.np/
http://myopinionsareimportant.com/
http://www.roadlesstravelled.com.au/
http://www.thefitshack.com/
http://www.foximus.com/
http://www.5xmom.com/
http://dereksemmler.com/
http://linguisticszone.blogspot.com/
http://www.zr5.net/
http://smartwealthyrich.com/
http://howtosplitanatom.com/
http://diydollars.com/
http://www.hughhollowell.net/blog/
http://crayonwriter.com/
http://blograters.com/
http://tagskitchen.com/
http://trademacro.com/
http://www.bracingyourbrand.com/
http://mumshome.blogspot.com/
http://www.brianpratt.net/
http://www.bestrealincome.com/
http://1000milejourney.com/
http://www.3daymom.com/
http://lillieammann.com/blog/
http://advertising-for-success.blogspot.com/
http://andtothink.com/
http://andybeard.eu/
http://www.angschickencoop.com/
http://mouseski.blogspot.com/
http://armymomnj.name/
http://www.artkauffman.com/
http://thearticlewriter.com/blog/
http://askjason.blogspot.com/
http://askjasonbusiness.blogspot.com/
http://www.axplay.com/
http://www.benspark.com/
http://benspark.blogspot.com/
http://www.biggerpockets.com/renewsblog/
http://www.bizmarktech.com/
http://blogaboutmoneyonline.blogspot.com/
http://www.bloggingforbills.com/
http://www.bloggingtips.com/
http://www.bloggingwv.com/
http://blogocola.com/
http://blogozine.blogspot.com/
http://bpmonaco.com/
http://www.bodyfitnessinfo.com/blog
http://www.bodymindandsolar.com/
http://bostonbrat.net/
http://brownsista.com/
http://www.buylivebetter.com/
http://www.buymeblog.com/
http://buzzqueen.blogspot.com/
http://hterry.com/
http://writetoright.com/
http://www.campingcoop.org/
http://www.candidquips.com/
http://thedivinedivas.blogspot.com/
http://www.thenykazafamily.blogspot.com/
http://www.clappingtrees.com/
http://www.jhsiess.com/
http://comedyplus.blogspot.com/
http://www.communityspark.com/
http://engineering.curiouscatblog.net/
http://dillydesigns.com/
http://tiffany-happyhousewife.blogspot.com/
http://cooladzine.blogspot.com/
http://craftblog.stitchingthenightaway.com/
http://crafts4dummies.blogspot.com/
http://www.davidairey.com/
http://www.dontfearthetruth.com/
http://www.dorisgoshopping.com/
http://www.venusmaria.blogspot.com/
http://www.ecommtips.com/
http://www.emomsathome.com/blog/
http://emoneymarketing.com/
http://endangeredspaces.blogspot.com/
http://www.fibromyalgiaexperiment.com/
http://titaniastarlight.blogspot.com/
http://www.fitforfreedom.com/
http://flat-water.blogspot.com/
http://foolswisdom.com/
http://www.footprintsonthemoon.com/
http://www.fuzzyfuture.com/
http://www.jonlee.ca/
http://www.jonespc.com/
http://feverishthoughts.com/do-follow-bloggers/
http://www.juliesjournal.com/
http://www.justnotmartha.com/
http://kansha-shite.blogspot.com/
http://lastblogger.com/
http://leaveamerica.info/
http://www.fastlanetransport.ca/blog/
http://www.lifeisrisky.com/
http://lifelearningtoday.com/
http://www.ladylike4.com/
http://www.dorischua.blogspot.com/
http://www.krissy.nu/
http://lifecruiser.com/
http://www.littleamerica.us/blog/
http://dorischua.com/
http://magicalrosegarden.blogspot.com/
http://marketingblagger.com/
http://master-cleanse.info/
http://www.midlifemusings.com/
http://www.momisnutz.blogspot.com/
http://momreviews.net./
http://www.motheringmany.com/
http://www.mycreditgroup.com/membersblog/
http://www.mydandelionpatch.com/
http://www.msaufong.com/myhomerecipe/
http://www.tiffanysmuddledmind.com/
http://yesmyopinioncounts.blogspot.com/
http://mythoughtsideasandramblings.com/
http://nanashi-inc.net/weblog/
http://www.newcenturypolitics.com/
http://www.noaveragemom.com/
http://feverishthoughts.com/oddplanet/
http://recoveringlutherans.blogspot.com/
http://www.openroadbiker.net/
http://www.patricksays.net/
http://paulamooney.blogspot.com/
http://pbriscoe.com/
http://www.peggysazlife.blogspot.com/
http://www.pencilthin.com/
http://pimpmypagerank.com/
http://www.pinkpoisonstore.com/
http://www.chatbugkaren.com/
http://afrogtokiss.net/
http://randaclay.com/
http://veganmomma.com/blog/
http://thereasoner.com/
http://www.rottenbananas.com/
http://www.thesassysoutherner.com/
http://www.scribbleonthewall.com/
http://news.nanashi-inc.net/
http://greattravelandculture.blogspot.com/
http://selfhypnosisprogram.com/
http://shoppingflavor.womenmumbles.com/
http://www.showmehealthbiz.com/
http://www.showmemoneybiz.com/
http://www.simplekindoflife.com/
http://www.seo-ths.com/
http://skeetsstuff.skeeterbess.com/
http://www.solo-technology.com/blog/
http://sophistishe.org/
http://sqkiki.msaufong.com/
http://super-blogging.blogspot.com/
http://soleflor-en.blogspot.com/
http://table4five.net./
http://travel.twodogzoo.com/
http://teascoop.com/
http://blog.techiezone.in/
http://www.aaronroselo.net/blog/
http://usaer.blogspot.com/
http://thermalblog.co.uk/
http://timeforblogging.com/
http://www.feverishthoughts.com/
http://www.twodogzoo.com/
http://www.utterlygeek.com/
http://wandersworld.fourleafhosting.com/
http://thewebfiles.com/
http://feverishthoughts.com/webdesign/
http://www.whateverifeellike.com/
http://www.wildncrazyride.blogspot.com/
http://chatbugkaren.com/windingthreads/
http://www.wiredkayaker.com/
http://womenmumbles.com/
http://workathomemomrevolution.blogspot.com/
http://blog.c-yoga.de/

The following do follow forums are listed according to their niche and their Page Rank. This is a huge resource for your SEO linkbuilding campaigns in order to find relevant places to promote your website.
Do-Follow Forums with PR by Niche
Webmaster/SEO/Internet Marketing Do-Follow Forums
http://www.sitepoint.com/forums/ PR7
http://forums.digitalpoint.com/ PR7 Post requirement prior to sig link
http://forums.seochat.com/ [...]

A great way to start building backlinks for off site SEO of your website is to get involved with forums and create a signature to appear in your posts. Make sure that your posts are relevant so as not to be deemed a spammer.
In your users cp on a forum you can edit your signature [...]