StumbleUpon
 
StumbleUpon is by far my largest traffic source from social media networks. I get a steady stream of new traffic from StumbleUpon to read my content everyday. I also find it a great service to use as a user not just as a marketer when I want to kill a minute or two.
 
How It Works
 
StumbleUpon [...]

So, before you start anything, you have to pick the network that will work for you. Each person is unique with their website and as a result the websites they create to promote are also unique.
 
How to do it
 
There are general networks that work for almost any niche. Stumbleupon, Digg and Mixx are good examples [...]