Here is an excellent article on how to get the most out of digg.com. What I like about this article is it’s understanding of integrating digg with your greater marketing and sales goals. Social media sites in general, and digg in particular, should be just one element of your overall marketing strategy. It reminds me a bit of pay-per-click advertising, wherein your landing page needs to compliment and follow up on the content of your ad. So too, with social media sites, you have to have a plan of what you want to do with those social media visitors who come to your site.