Which is the best Techniques for Back links ?

I run 20+ sites and I know it's much work to build permanent backlinks.
I opened sites on
- Myspace,
- Facebook,
- Wordpress,
- Squidoo and some other web community sites,

I wrote comments to forums and publised articles to Ezinearticles.com and other article publishing sites.

This all worked for me but it's really time consuming.

2 month ago I started a test with 2 of my sites with a free link building service (see link in my signature).

I selected long term keywords which are not so competetive but have a high search volume. Than I added these long term keyword to the link building service.

I selected to get only 5 backlinks/day for each keyword phrase.
You also can select the language and the category where the backlinks shall be placed.

Now I've got these 1-way backlinks:

Site A: 1200 backlinks
Site B: 2100 backlinks

The backlinks are from hundreds of different c-class ip addresse.
Most of them only have a PR of 0.
You also can get PR 1-4 links, but these are reserved for paid members.
When paid members don't use them up they go to free members.
In return you need to insert a small program on your site which places other links. You can choose between 1-5 links to get displayed.
The more links you display on your site, the more points you'll earn and the more backlinks you'll get.

These are the result:

Vistitors/Day at Nov.4th. Jan./15
Site A: 5 50
Site B: 12 150

PR Nov.4th. Jan./15
Site A: 0 2
Site B: 0 3

During the 2 month I did nothing else with these sites to get an honest result.

 

no fast method , has to work long time for gettting back links. forum posting , blog, article submission. directory submission etc. all will takes months bcz google is updating in every 3 months i think