Social bookmarking websites always confuse my social media strategy customers.  There seems to be an aura that somehow just posting all of your own content to these sites will somehow magically drive massive traffic to your website.  Of course, it doesn’t work that way.  And unless you have a certain objective or niche demographic that tends to find a large population of your targeted users using sites like Digg, Reddit, or Delicious, my advice is simply to concentrate efforts on other more popular sites.  I will make one exception, though: StumbleUpon. First of all, StumbleUpon is not a niche site. …