A few weeks ago I made accounts on associatedcontent, hubpages, and triond. Those are some sites that invite us become contributor for them. But unfortunately I already have my own blog and I think it is funny if we make a post for them then we paste to our blog. We should have post in our blog first and then paste it there, so I just copy my post from this blog and paste there.
To be a contributor on associatedcontent and triond is easy, but how to make what we contribute, content what we post must in accordance with the style they like. Not all from our post published by them, just like that. The post must be through the selection from the editorial team.
And it is not easy to earn money there. If you want to earn money you have to be a good contributor, make a lot of post, because the page impressions there is very important. Get high traffic and you will have many  chances to earn money.

It is different with hubpages. On hubpages there is no editor and we are free to post there. But if you want to register, you should have an affiliation channel, like google adsense, amazon, etc, because of our ads will also appear together with ads from hubpages. For example if you have an adsense account, you must put your account too when you register. That means hubpages has an access to manage the type of ads which will appear from your adsense. View source someone’s hub if you want to prove. Hubpages relies on PPC, not page impressions. We can’t earn money if only with page impressions. It is difficult because we just get a little part from PPC there.

Many websites like that, for example like howtodothings. But it is very difficult to join there and I have got denied before. Just like I said above. I already have my own blog, and I should be loyal. If you have a blog and you are a contributor there, do not forget to put your blog link in the end of the post.