Directory submission is a good way to get targeted traffic from web directories. Just choose to submit to high PR and directories with high traffic stats and you are on the right track.
Article marketing could be a good source for link batiting so long as you produce unique and helpful articles relevant to your niche. Link baits can be in the form of an article, video, etc, - anything that would attract toher sites to link naturally to your site. This type of organic links are favored in PR building.
On social boomarking, this site might be able to help you
Top 30 Social Bookmarking Sites | eBusiness Data | eBizMBA
Hope that helps
