How do you find blogs to comment on?

[scheng1]

I find that when one good blog has dofollow for comments, the blogroll will contain other blogs with similar dofollow for comments.
Alternatively you can comment on Hubpages. As long as you choose those with score of 75 and above, the article and comments become dofollow.

[hicell]

i often search the do-follow blogs in goole.

[johnlee04]

But my flawed SEO logic has proved it.

I hope it's okay to ask for a proof just for the peace of mind. Cheers!