Best methods to find feeds/content for autoblogs (e.g. WP Automatic)? Most important do’s and don’ts/best practices for autoblogging?

I'm looking for beginner autoblogging advice. In my case I will be using WP Automatic. What are the most important do's and don'ts, when it comes to autoblogging?

Also, what are the best methods to find feeds/content sources for autoblogs?

Any tips from those who have experience with or had some success with autoblogging is welcome.