I just released a nice little package to assist with searching for objects in your scene. Instead of searching manually for objects in an area, SearchGrid allows you to quickly and efficiently search for objects!
The store page is here: Search Grid | Physics | Unity Asset Store
As always, if you have any questions or feed back, please let me know on the forums!
You can also reach my on Twitter @AlteredR or at AlteredRealityEnt@yahoo.com.
For info on Altered Reality and our products, you can check out our website at: www.alteredr.com
Enjoy!