Building Backlinks - Problems

When I started this blog a few years ago. I read and learned that the main ways to build backlinks to your site was: post comments on other blogs, post comments on forums, write articles etc.

Today, these methods work less then before. Most blogs have "nofollow" tags on your comment links, articles if used on another site doesn't give your site any juice and you may have to worry about the duplicate contact penalty (maybe against your site). And as I believe I have mentioned before a number of site just post a snippet of your article with a link back to the original article directory where they got it from.

So what do you do? New way to build links back to your site come out everyday but don't work for long.

So if anyone knows of a good way to build backlinks, let me know!!!