Confused On How To Use Social Bookmarking To Get Back Links & Traffic

ok...will try to explain what I am confused with:

I can't seem to wrap around my head around the concept of social bookmarking. It appears to be abused from what I have read, and do not wish to do so.

I am just building my backlinks and in a very competitive niche. I have created many valuable list type articles and a ebook but do not know what to do with them yet as far as social bookmarking goes.

Not sure if I should submit all of my articles to all 135 social bookmarking sites or just what I consider the best articles but if I worked hard at making all of my articles valuable then what

1) Am i submitting my site url or the home page as one of my bookmarks or this does not count

2) how should i use social bookmark sites to gain me traffic or backlinks correctly with spamming or getting others upset

3) Am I not spamming if I submit my own articles does it not like self promotion since I am bookmarking my own articles and I can members of the community angry at me

4) How do I benefit from backlinks are the dofollow or nofollow

5) is it not better to focus on just 1 or 2 of them where you can build a momentum i hear it is like a community too but not sure

6) I have about 20 articles that are original and provide great value and a ebook if you were in my shoes what would you do to get started using social bookmark sites to help gain traffic and links