First automatic article submission is the preferred way to submit articles as far as exposure and your own sanity. Nothing wrong with it, no penalties of any kind, it works and works best.
You can submit the SAME article (make sure to always use the same author name) to a million sites, you don't have to change it or spin it, that is NOT duplicate content and you don't have to worry about that, it's just a common misconception.
For more information on the
real definition of duplicate content read this thread:
Duplicate Content: It’s Not What You Think!
Also article marketing is a vital and crucial way to get backlinks and
YES your link in the resource box or author box definitely counts as a backlink!
Anchor Text
For backlinks make sure that you use your good KW in the anchor text so that Google can associate your site with your KW's = relevancy, but change it up some, keep the KW's in the links but add other words. Just make sure it looks natural, makes sense and is appealing to the readers of your articles. (you should do this will all backlinks)
For example if my KW is Cheap Laptops then my anchor text would be Buy Cheap Laptops, Browse Cheap Laptops, Cheap Laptops for Sale, Your Site Name - Cheap Laptops...etc
Here is a simple formula on how to divide your time when working on backlinks:
50% relevant link exchanges, blogrolls and one way links when possible
(A good way to search for relevant sites to exchange with is Google: blogroll + your KW)
40% Article Marketing
10% Directory submission (yes automatic services are fine and work great)
Here are a couple of long lists of directories with hyperlinks for easier submission and they are sorted by PR
Add URL.nu : Add your URL to free SEO friendly directories
Deep Links Directory List - Directory Critic
Don't worry you don't sound ignorant, this stuff is confusing but after your did for while it will all be clear. Good Luck to you!