>>7475158Start slow.
Begin by sorting out all your standard bricks and plates from everything else, and sort them into two separate piles as you do so. Then sort your bricks by type, and then sort your plates by type.
After that, it's just a matter of deciding how you want to group your pieces. Always start with general groups and fine-tune your organization later. Don't try to sort every single piece into a separate group right away, because you'll end up with too many piles at once and it will slow you down. It's better to put things like "all clip pieces", "all bars/rods", "all flat tiled pieces", etc. together, and then subdivide after you've got everything roughly sorted.