There are hundreds of people on forums such as Digital Point giving you the opportunity to have a blog post published across 100 different blogs.
This tactic is clearly not going to be something Google agrees with so if you want to use it then make sure you follow some simple rules.
The first is to make sure you don’t link to your site using obviously unnatural anchor text. Rather than saying “Visit SEOptimise for SEO” you should say something like:
“I was reading an interesting post about xxxxxxxxx on the SEOptimise SEO blog last week and it raised some great points. However I disagree with xxxxxx”
The key is to make the post appear 100% natural and, most importantly, something that you haven’t written.