Keep the visitor involved and on-site Put your RSS and Email subscriptions right where they can be seen Call to action not just “subscribe” – give a reason why they should sign up, a damn good one
(and be sure to check out Chris G’s call to action for subscribing to his RSS feed… smart stuff.)
If you’re especially curious about distributing your content to the Digg community definitely read Andy Hagan’s Interview with Muhammad Saleem, Social Media Professional.
This quote should give you a pretty good idea of who you should target with your content, or who you should be trying to emulate as a content distributor:
Once I started participating, at first it was a little frustrating since as a new user it is harder to get on the front-page of the site (not because of the way the system is set up, but just because you have to really understand the community and their preferences to succeed).
But I kept at it for a while, made some friends that guided me through the process and taught me how to better participate and succeed in the community. In 11 months since joining Digg, I managed to reach #9 on the Top Diggers list.
You’re either writing for him or emulating his trajectory by submitting the content of others to the Digg community.
Make sure first that your site converts visitors to subscribers though
Update: And do read this interesting snippet from BoingBoing’s coverage of a Wired article on buying Digg votes.