Be Still and Know

Do you like organized sketchbooks, like having a sketchbook for life drawing and a seperate for concepts, etc?  Or do you like messy sketchbooks where anything goes?

I’m considering starting a few sketchbooks that would be focused on certain things, like landscapes, life drawing, anatomy, etc.  That way I can keep track of my progress a little better and can see areas that need work.  But, I don’t know if that will be very helpful because I tend to be rather spontaneous in the way I work.  I guess I’m just trying to organize my thoughts a little bit.  I can be so scatterbrained with art.

What works for you?