As we know the most important in SEO is Link Popularity, even your site don't have meta tag but if your site have good link popularity, so your website will get index in first page on search engine.

The old fashion to get backlink is we contact one by one the other webmaster and aks them to link exchange their website with us.

But now we can get more backlink with easy, and the good news is this one way backlink. It's mean more power full backlink.

1. Social bookmarking Site

Social bookmark is one of place that we can put our link to that website, and the few of that site have good page rank. here some of the social bookmarking site.

1. http://digg.com
2. http://delicious.com
3. http://furl.net
4. http://reddit.com
5. http://spurl.com

What you must to do is register to that social bookmark site and submit your site. it' prety simple right.

2. Blog Walking

In this way what we do is browse other blog that have related content with our blog, and then live your comment. But remember don't do comment spam.

3. Forum

Search forum that have same topic with your blog and register there. after that setting your signature with your link to your site.

Now everytime you post your comment on that forum you will get more backlink to your site.

Many more ways to get one way backlink to your site. But now just try that 3 ways first :)