And which of these social bookmarking (e.g. Stumbleupon, Digg, del.i.cious, etc) and social networking sites (Myspace, Twitter, Facebook, etc) works best for you? Why

Thanks

I use Digg.com and also Buzzfeed.com primarily. Buzzfeed is nothing special, but I have had a lot of luck putting my pages on page 1, position 1 of Google very quickly.

It is actually a good idea to use as many networking sites as you can to get traffic. I even go as far as digging my Buzzfeed posts, and stumble upon pages. Then I Clipmark my Diggs and original pages. Then I just keep linking between everything. It works well.

The hardest one to fudge, in my opinion, is Digg. You do not want to just create a bunch of accounts and vote for yourself. You need real people to Digg you.

I have some friends and family that I ask to Digg for me sometimes, and am always trying to expand my contacts. I am always happy to Digg sites for others, and hope that they Digg my sites.