Complicated question about backlinking

First of all I would like to thank all of my fellow marketer in the forums that even though there are lots of questions that keeps on coming they are still giving good answers(some are irritated because it is already available on the forums) but still giving good advices... For that I salute all of you guys and thank you!

Ok so here it goes. Currently I am creating a Monthly Checklist for my project by week 1 of september and I encountered few questions that I am having problems finding here in the forums. just a heads up this is a affiliate site with 200k+ competition that's why I need every resource I can get.

1. About Social Bookmarking(got the top 20 only bookmarking sites)
a. Bookmarking your site is good, how about bookmarking your every post?
- On my checklist I will be posting articles in my "Mainpage" every 3 days.

***So is it "ADVISABLE" to get 20 BOOKmark every post in the mainpage?
(I know that DIGG will ban your URL if you keep this up but how about the other Bookmarkingsites? is this advisable? Do some of you do this?)***

b. Is this how bookmark works??
***- 1 article submitted to EZinearticle > put 20 bookmarks (then ping it) > then put 20 bookmarks for EACH of the bookmarks for the article(another 100 in total bookmarks). Is this how it will give you great results? or can I remove the last part of bookmarking??***

2. XML sitemaps(Wordpress plug-in) vs Google webmaster.

a. Which is more efficient on this 2?
b. XML sitemaps automatically creates and submits your sitemaps right? If so Will I need to submit "THE same sitemap" in google webmaster tools???

Thanks again and hope to get some answers even some comments because it will really help.

3. What tool can I use to track backlinks aside from alexa???

4. Sending the same article to this site (daily) 1 different article per day.
ArticleCity, ArticlesBase, Buzzle, EzineArticles, ActiveAuthors, ArticleAlley, ArticleDashboard, ArticleSnatch, ArticleTrader, OutOfStress, SearchWarp, Site-Reference, SooperArticles, WebProNews, EZineArticles.com , GoArticles.com, ArticleDashboard.com, ArticleAlley.com, iSnare.com. Then bookmarking them.

Is that considered a spam???