First let me say - it's not a quilt I made if there isn't a part that hasn't had to be taken apart and re-ewed.
But if I am just keeping track of rows then I stack them pieces knowing the will be sewn from left to right, and pin each row with the number of the row.
If it's a block that I am making then I make a sample, take a picture of it with my phone and I put the pieces in a box in the shape of the block.
I made a project wall but very rarely use it.
I have made a couple of Trip Around the World quilts and just cut out the whole thing after drawing what I wanted on graft paper. Same with my Irish Chain - in fact, I do that with all my quilts.