I kinda sorta sort by color and by size and type -
For example: Smallish blues ( 2 yards or less) are together
I Spy are sort of together - but grouped within the totes (sometimes - frogs are grouped, sports are grouped, etc)
Black and whites are together
Batiks - of which I have very few - are together
The "unwashed" are in a separate stack of totes
Next time I have to unfold a piece, I am going to try to remember to measure it and attach a tag to the fabric telling me the dimensions so I will know what they are the next time - -
The "Large/Long Washed" are stacked on a bed.
And then there are the dreaded scraps and UFOs.