I think promoting your work is really critical if you are not writing articles that arehighly searchable and written with strong SEO (search enging optimization) and keywording. I have found that keywording and SEO are much more important that social bookmarking sites. Most of my articles when I google them with the most relevent terms put me on the front 1-2 pages of google.
If you do not know much about how to write searchable articles, how to use keywords in titles/subtitles, then I do think social promotion is critical to increased performance. However, what I have found is that social bookmarking sites may only give me a few extra hits a month (at Suite we can actually see how people are finding us). I did use onlywire
(see link for my original directions on how to set it up). It is a bookmarking site that bookmarks over 20 different other bookmarking sites at once, many of which are featured on the AC page. When I was at AC, I would onlywire and digg my stuff. That was it because I didn't want to get too involved in that process.
I do think at AC the best way to increase your PV if you do not know much about keywording is by inner-networking. Commenting on others pieces, letting them know you are subscribing to their publications, etc. Most people will return the favor. My issue was that all of that was very time consuming, and it only helped increase PV initially. An article would perform well immediately upon publishing, then flatline.