Are you new to Goggle+ ? this will be very helpful for you. Check the original post UNDERSTANDING GOOGLE+ v2.0

Also you can check the following Chrome add-on which can help you to decide  which Circles show up in your Google+ Stream. So if you want remove some people from your Google+ stream, you can add them to a circle and remove that from the Google+ stream.

Here is that Add-On

You can also check the following post

Digging Into Ripples