Social bookmarking is the best way fasten the process o indexing. But, if you want to really get traffic from social bookmarking techniques then, I feel you should concentrate on top 5 sites. Make permanent accounts. Submit random stories as well. Make plenty of friends and communicate with the them. Try building a good will in the sites. And then if you submit your site, see the rocketing traffic you generate from them. Bookmarking on 100 sites would not do so good, then submitting to top 5. This is what my experience says. Correct me
I'll probably start bookmarking my blogs posts individually. I know there is a Wordpress plug-in with a ton of sites for bookmarking.
If you bookmark too many pages of a single website it could trip a spam filter and get you banned. Beware.