I recommend using circloscope to manage you circles.
Here is the extension: http://goo.gl/RQVFp it costs $5 for premium and is well worth it.
I was doing so circle adjustment yesterday and thought just how great a tool this is!
Here is a list of easy to follow 'recipes' you will find in the app. Very straightforward, and +Ehsan Ahmadi Gharacheh is on hand to help you out too. Hope it helps to get your circles in order.

What do you want to do?
Switch to another account...
Start: Account > (Click an Account to Switch To)
If your Account is not Shown, Login to the Account and then Click Refresh

Find and remove all (or some of) people in your circles who have not added you back...
Filters: Reset > All
Filters: Relationship > One-way (You follow)
Filters: (Use various filters to narrow down if needed)
Filters: Selected > Select All Filtered (or some of them)
Actions: Circle Operations > Remove From All Circles

Find and add all (or some of) your followers to your circles...
Filters: Reset > All
Start: Import Data > Followers
Filters: Relationship > One-way (Follows you)
Filters: (Use various filters to narrow down)
Filters: Selected > Select All Filtered (or some of them)
Actions: Circle Operations > Add to a Circle

Find and remove all (or some of) inactive people in all your circles...
Filters: Reset > All
Filters: Relationship > In Circles
Filters: Selected > Select All Filtered (or some of them)
Start: Import Data > Activities
Filters: Selected > Unselect All Filtered
Filters: Inactivity > (Set #Days)
Filters: (Use various filters to narrow down)
Filters: Selected > Select All Filtered (or some of them)
Actions: Circle Operations > Remove From All Circles

Find and add all (or some of) people who engaged (+1 / reshare / comment) in a post and it's reshares...
Filters: Reset > All
Start: Import Data > Ripples > (paste URL of the post)
Filters: (Use various filters to narrow down)
Filters: Selected > Select All Filtered (or some of them)
Actions: Circle Operations > Add to a Circle

Find and add all (or some of) people in a shared circle...
Filters: Reset > All
Start: Import Data > Shared Circle > (paste URL of the post containing shared circle)
Filters: (Use various filters to narrow down)
Filters: Selected > Select All Filtered (or some of them)
Actions: Circle Operations > Add to a Circle

Find and add all (or some of) people in a TXT/CSV/HTML file containing Google+ IDs...
Filters: Reset > All
Start: Import Data > Google+ IDs > (paste content of the file containing Google+ IDs)
Filters: (Use various filters to narrow down)
Filters: Selected > Select All Filtered (or some of them)
Actions: Circle Operations > Add to a Circle

Find and add all (or some of) people previously removed using circloscope...
Filters: Reset > All
Filters: Source > Removals
Filters: (Use various filters to narrow down)
Filters: Selected > Select All Filtered (or some of them)
Actions: Circle Operations > Add to a Circle

#circlemanagement  
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