This question already has an answer here:
I live in Hungary. I have tens of thousands of bricks at home. Over 1000 sets plus bricks. Most of the sets are sorted and packed separately, in their original boxes if they can with a box. Unfortunately some sets were mixed and kept in cardboard boxes. i. e.: 15 Harry Potter sets all mixed in a big box. The problem is that LEGO changed the colors in 2004. I must sort all parts according to color and type first. After that I can start putting the sets together from lists.
Is there a good way you know for physically sorting parts according to color, shape, etc?