Viral marketing ... word of mouth. Create something catchy and unique that people will naturally want to tell their friends about, link to, etc.

Social networking/bookmarking.

Yup, there's no valid reason not to create RSS feeds nowadays.

go for social bookmarking and article submission,this had increase my traffic by 1000+unique per day.

Thanks to all who replied!
What are the best social bookmarking sites?

Social networking/bookmarking/tutorial/wiki

Furl, Reddit, Sphinn, Stumbleupon and Startaid.com are some of the best.

i would prefer:

igg.com
Technorati.com
del.icio.us
Propeller.com
StumbleUpon.com
reddit.com
blinklist.com
netvouz.com
Furl.net
spurl.net
Mister-Wong
dzone.com
ma.gnolia.com
ShoutWire.com
simpy.com
purl.net
myweb.yahoo.com/
de.lirio.us
clipmarks.com/
wink.com
myprogs.net
a1-webmarks.com
marktd.com
popularinbookmarks.com
bibsonomy.org
bmaccess.net
bookmark4you.com
zurpy.com
wirefan.com
thoof.com
tagza.com
tagtooga.com
slashdot.org
plugim.com
multiply.com
yattle.com
linkarena.com
icio.de
corank.com
gather.com
connotea.org
aboogy.com
bookmarkall.com
buddymarks.com
citeulike.org
i89.us
linkagogo.com
linkswarm.com
info4it.com
bookmarks.ph
astromarks.com
tagvibes.com
xerobug.net
klikeranje.com
familiya.com
scuttle.jayl.de
wizdom.ch
intellimarks.com
tagchief.com
nutmouth.com
aretags.com
bookner.org
linklog.de
link-link.net
projecthear.net
hibookmark.com
segnafavoriti.org
hibookmark.net
morehello.com
aretags.com
myfavlinks.com
wordsjournal.com
bookner.org
ourteam.com
faved.net
maxtags.com
terrysbookmarks.com
quickbookmarks.com
faves.com
diigo.com
markaboo.com
netvouz.com
ma.gnolia.com
folkd.com
hanzoweb.com
clipclip.org
socialogs.com
kinja.com
kick.ie
fungow.com
ez4u.net
rawsugar.com
social-bookmarking.scriptil.com
spotback.com
oyax.com
tagza.com
urlex.info
fuzzfizz.com

how we can use "igg.com"?