I'm experiencing the same thing right now. Kind of funny, seeing as how my "organizational approach" is along the lines of "remember where you dropped it". Guess that means my runtime is really bad, if even I can't find anything? Here's the thread I posted recently about the same subject: http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2810333

I've been taking it a little at a time, starting with my character (figure) library. So far I've made three folders for human figures (from SM, DAZ, and other places) and one folder for animals. I'm also planning to end up with folders for vehicles and buildings/scenery. When I get to the other libraries, I'm planning to sort by the same six top-level folders, and then sort by the figure/vehicle/scene/theme an item of content goes with. Probably my Pose folder will have subfolders under each figure for MATs, INJs, and positioning poses.

~*I've made it my mission to build Cyberworld, one polygon at a time*~

Watch it happen at my technology blog, Building Cyberworld.