In my libraries, everything is all over the place
I think it is time you sat down and sorted out the organisation of your files ! There is no hard and fast rule as to how you do this, but the aim of the exercise is to be able to find a particular file again should you need it.
Using the 'libraries' in Windows is fine, but you still need to organise your files. The only thing I use the Windows libraries for is the odd default file thrown up by some of my games - which aren't important - and keeping my wallpapers in, but this is a personal prejudice and not by any means something that would suit everybody.
To take our personal photos as an example, I have a folder called - with startling originality - Photos ! Inside this, continuing the theme of original thought, I have folders called Photos 1, Photos 2 . . . to currently Photos 13. Inside each folder, the images are catalogued by year, month and subject, each group in its own folder. Whenever one of these Photos_n folders gets to about 4 - 4.5 Gb it gets backed up to a DVD while the originals remain on my hard drive, and I go on to Photos_n+1. While none of these images are in \Pictures\My Pictures this organisation would work as well there as it does on my Drive_F.
The same principals can be applied to any other type of file :- Word documents - a folder for mortgages or rental; bank accounts; family, etc..
How you organise your files is how you organise your files, but you do need to organise them !. The only reason for saving a file is to be able to refer to it again in the future, and if you can't find it you might as well not have saved it in the first place.