If you need directories, you can find top ones on vile silencer list. Just google vile silencer list and you will find it. Directory list is free, but you have to do manual submission. Best strategy is to add up to 20-30 new links per day and not more.

Blogging is also very good link building strategy. Create lots of themed blogs on various websites and link them all to your website. Many websites that host Wordpress blogs will allow you to create your own blog.

As for articles, you can submit them to top article directories like ezinearticles, goarticles, article dashboard, etc. but you have to change every article a little bit so it won’t be recognized as duplicate content. Best way to do this is to use some kind of article spinner. There are a lot of free article spinners on the Internet that can do this for you.

What ever strategy you choose, don’t build more than 20-30 links per day. So I would recommend to avoid automatic submission websites, or at least limit your submission to 20-30 per day.
References :
Here is an interesting article you may want to read:
http://www.nettrafficsecrets.com/beatcompetition/

1. write good quality article or pay someone to do it for you.

2. Spin it manually so you get 50 unique articles.

3. Submit to different directories.

Repeat 1-3!
References :

1. Write article on targeted keywords. Article will be 350 to 450 characters.

2. Article title must contain your targeted keyword.

3. Article summary will be contain your targeted keyword & good content to improve click through rate of your article. It will happen after listing on major search engines.

4. Article body will be specific to targeted keywords. If visitors will visit your article so, It will fill that, this is really good article & proper as per my need.

5. Article body must be unique. If you need more time to create article so, It will ok. But, duplicate content will never give you benefits.

6. Article signature must be with 2 or 3 active links.

7. keywords must be as per your target.

8. First identify category as per your keyword. It will improve your article approval rate. Simply search your keyword in article directory.

9. You can visit any similar article & get category idea.

10. If any article directory allow images in content so, It will good for you.

11. Always try to find out high traffic & active article directory.

11. If you are searching for article submission resource so, you can use Google or free content distribution website.
References :

Nevertheless, should your website or opening webpage
fail to contain "generic" keywords, then anyone using
such "generic" queries will not be able to discover
your website. Your domain name [URL] of your website,
in a sense, will be invisible, undiscoverable.

You may want to consider some simple algorithms which,
when observed and committed in designing of a website
with placement of various critical metatags that can
surely achieve a high search engine presence and
increase Internet traffic to your website. These
metatag strategies work well with published webpages
at Google and Yahoo.

Design: Should you create an extensive Flash-based
website, make sure to fill-in the property entries
such as the Title, Description and Keywords. Failing
to do so, leaves no hard HTML or ALT resource that can
be readily indexed by search robots. Also consider the
Internet audience and their incoming setup. For
example, if they are on analog/dialup, Flash webpages
take too long to load up and therefore analog users
will likely lose interest and discontinue entering the
Flash site. On the other hand, anyone on hi-speed DSL
lines, will welcome Flash pages which load quickly. So
before designing a pure Flash websitge, ask the simple
question, "Who’s my end user – is he on dialup or
DSL?" And if you had to choose between these two users
for maximum marketability, then select analog users
since 80% of most resident users are still analog
Internet subscribers and pure HTML designed webpages
is best for them.

A non-Flash-based website which relies on hard text,
is far easier to be indexed by search robots. Limit
the use of stylized text saved as .gifs since as a
graphic, they are not indexable by search robots.

Avoid use of frames since any number of search robots
are unable to properly classify textual material.

Placement of Metatags:

A ranking or search order does take place with Google
and Yahoo and it begins with the "Title" metatag which
should consist of no more than 65 characters separated
by commas. The "Title" should describe in generic
terms, the goods and services, followed by a location
from which the resource is located, i.e., city, state.
The placement of a domain name which is not generic
within the "Title" is not appropriate, unless your
domain name is a major recognizable brand name.

The second metatag is the "Description" which is
usually 25-30 words to form a complete sentence which
best describes one’s goods and services.

And the very last category – "Keywords" are also
somewhat limited to 15-16 words which can be plural
and compound in nature. Again, avoid multiple entries
which could be mistaken as "spamdexed entries" which
is defined as the loading, and submission of
repetitive words into a particular metatag category.
"Spamdexing" when discovered on a webpage and reported
to Google’s spamreport.com can result in the
elimination of your website from their search
directory.

Good luck!
References :
Webmaster article from google.com.

There is an on-site spinning tool, One article can have 30 non-duplicate versions.

The republication of your articles will also be controlled so as to look natural to search engines. This system is legit, powerful and proven. But, of course, you will need to be writing and/or submitting articles.

If you can outsource the writing and submitting, you will have no need for any other link-building system.

If you’re interested, you can find the link in my profile.
References :