There are always a few that could go in one or more places.
Examples: the black and white cat prints - do I put them with the cat prints or with the black and white prints?
The multi-colored ones that don't have a dominant color - do they go with the "theme" - such as florals or geometrics? or in the "miscellaneious" stack?
The holiday themed cat prints - do I put them with the Holiday - or with the Cat Prints?
etc etc
Those are the decisions that kind of slow me down.
Now - when there gets to be ENOUGH of whatever to have its very own tote - - -