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More seriously, can you sort going off bricklink sub-sections for parts? Or if not, colour? If you have parts connected together you can probably assume they are from the same set, then pick the remaining parts from the right colour piles.
Heads & Masks
Head Connector Blocks
Torsos with Ball Connectors
Torsos without Ball Connectors
32174 (yeah, a whole box just for this one brick type!)
2 x 7 connectors
Right Angle Liftarms
Wings & Jetpacks
Armour/Plates/Shields/Guards/Covers (all the things that are basically armour that are used in many sets)
Hero Factory Armour
Misc Armour (for the random pieces only used in a couple of sets)
Ball Socket Connectors
Odd Mini Technics bits
Blades (the ones that turn up a lot)
Grouped Blades (Similar blades put together, such as all the Visorak pincers)
Misc Blades (the random leftover ones)
Arms/Legs (anything that shows on Bricklink as both and arm and a leg goes in this one)
Hoses & Soft Axles
There will be a load of Technic elements as well.
If you happen to be interested in some more parts, let me know :)
With bigger lots I find it easier if I've sorted things into the above categories or combined versions of (say, all the masks and head connector blocks together, or not separating out the different types of liftarm), as once a set has been identified this seemed the speediest way to pull the other parts out. Finding an orange liftarm in a box of liftarms is much easier than finding it in a box of orange things, hahah!