Isolate Current Visible Layers and Shy / Hide all others
Just to automate and add to After Effects' own: in Comp Search and Select (see:http://www.motionworks.com.au/2007/06/ae_select/).
Would save me a ton of time when working with a large project (especially if it's cluttered— em... say passed on to you by another animator... not my own of course!

Wonder if anybody would be able to give this a shot ? - since I'm not even a scripting nubee.
Thanks in advance,
dM!