Speaking for myself.
 I have created catagories in my Poser  such as,
In Pose. I create a file called Clothing. In that I have files for every M3, M4, V3, V4 and so on. All my clothing pose files I have for V4, I move to the folder I created for her in pose all clothing pose files. I know now where to look when I need to find something for her in Pose and do not have to look through a big list. I did this in Figures too. I created a folder called Animals and moved all my Figure animals into it. It makes finding anything easy. So when it comes to finding anything in Pose. I do not have any problem at all.
Oh, One thing that helped was in Pose and figures. In the clothing folder I created. I made a folder called Mixed. That was for clothing that works for more than one figure.
I asked the question about how to make Pose mats because most others have it set up this way and I just wanted to learn.
Anyway, That is my 2 cents worth on it. Smiles to you